Have a few questions for a 67-72 F-250 build

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Wood_Duck
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Have a few questions for a 67-72 F-250 build

Post by Wood_Duck »

I’m new to the 67-72 crowd as my time has been with the 73-79 1/2 ton trucks in the past. I’m planning on building a new daily driver and I want a bumpside. Off the bat, plans are newer beefed up Dana 44HD(what years should i search) with crossover steering. I’m going to be also powering it with a p-pump B-series Cummins. My main question is given a choice should I steer more toward a High Boy or regular F-250 4x4 or is it irrelevant. And if I went High Boy would a ZF5 from a 2wd Powerstroke fit or will i need a 4x4 ZF5? Lastly anyone know if there are any current alternative fuel tanks that fit the highboys narrow frame without using the incab tank? Thanks for any input.
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Re: Have a few questions for a 67-72 F-250 build

Post by 71PA_Highboy »

OK, lots of questions there.

If you are going 5.9 (6BT) you want to find a Dana 60. 77-79 HP will be a direct bolt in, but will require a shorter front drive shaft (BTDT). Probably gonna want new front springs, so '99 Superduty will swap in with a new shackle.

in 67-72 all F250 4x4's are called 'Highboys'.

As for trans, you can use what you want as you have a divorced transfercase, so you just set the heights and make a custom intermediate shaft. I would suggest getting an NP205 out of a 73-77.5 F250 4x4 (also knows as Highboys), the Dana isn't the strongest.

You might also want to look at finding the engine cross member and PS box on a 77.5-79 F250 4x4 to swap in for better power steering.

Due to the myriad of cross members there is no easy swap fuel tank. You have to cut out a cross member (or 2) to get a tank in the back, and then there is no place for a spare...

Let us know if you have more questions.
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Wood_Duck
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Re: Have a few questions for a 67-72 F-250 build

Post by Wood_Duck »

Ok that’s good to know that they’re all considered High Boys those years, I thought they were both. I’d like to find a Dana 60 but that seems nearly impossible around here. I’m only planning 35” tires so I had assumed the 44HD would be strong enough if beefed up abit and gusseted etc. how much lift would 99+ SD springs/shackles yield? And is there a source for a brand new steering box that would work? Not a rebuilt or anything but brand spanking new? I know when I built my 77 4x4 years ago that was almost impossible to track down besides just a rebuild kit and I want my steering to be as new.
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Re: Have a few questions for a 67-72 F-250 build

Post by eggman918 »

With my 4BT/ZF5 swap in my '68 I went with a 2x4 ZF and ended up with a 11.5" intermediate shaft BUT I am running a divorced Ford np-203 range box with the ORD married adapter between the divorced np-205 that was modified to accept the married adapter by boring the case for the big bearing and adding a married input shaft. I have been running a low pinion open knuckle HD D-44 for ~70,000 miles and have replaced the wheel bearings @ 50,000 miles and so far the ball joints are holding up, my front axle is carrying 4,600# as it sits and the HD 44 is a 3,500# axle :( It is not trussed but I don't flog it off road, the 4BT was ~150# heavier that the 390 and th4 5 is ~ 550# heavier that the 390 I have a heavy bumper/winch on the front as well as a CrewCab so I might well be at the same front axle load as you would be at. My 4 BT is a VE engine with compounds and the VE pump maxed out so it's in the neighborhood of 275HP/and 550ft-lbs so comparable to the later stock 6BT's I am planning to do a D-60 swap soon but if I wasn't I would truss the 44 and upgrade to Cr-Mo shafts. One thing to consider is if you plan to use the cummins/ford adapter it's for the SBF bellhousing and that limits you to the 11" clutch so a quality heavy duty clutch is mandatory I an running the LUK Gold and so far so good but with the 203 underdrive that i use when baching and on trails I am very easy on clutches. There are aftermarket cummins/ford adapters that use the Dodge flywheel with the bigger clutch that have either the BBF or ford diesel bellhousing bolt pattern but they are quite pricey. Also with the 6 you will need to be creative with intercooler placement or will need to mod the firewall as well as the 4x4 front crossmember or the oil pan will need to be modified. I have a friend that is doing on and he has decided that the '90's F-800 IC will fight in front of the coresupport if you mod the hood latch, so far it looks like the grill will work as is but it's not quite finished so that could change :wink:
Steve

The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner

"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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eggman918
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Re: Have a few questions for a 67-72 F-250 build

Post by eggman918 »

One other thing I ended up having a local spring shop re-arch front and rear springs with new bushings and they added a leaf to the front packs to carry the added load.
Steve

The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner

"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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Ranchero50
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Re: Have a few questions for a 67-72 F-250 build

Post by Ranchero50 »

First, find the Hiboy, then wonder how you'll power it.
'70 F-350 CS Cummins 6BT 10klb truck 64k mile Bahama Blue

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Re: Have a few questions for a 67-72 F-250 build

Post by Wood_Duck »

Eggman, Just out of curiosity what’s your mileage with the 4BT in that truck?
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Re: Have a few questions for a 67-72 F-250 build

Post by eggman918 »

I'm getting a solid 17.5 around town and highway cruising @ 75mph the truck weighs 8,000 empty this is at between 4,500' and 7,000'.
Steve

The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner

"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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Ranchero50
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Re: Have a few questions for a 67-72 F-250 build

Post by Ranchero50 »

That's pretty heavy. My dually is 6400 lbs across the scales with me and the dog in it. Mileage is between 18-20.

If I ever go 4x4 I'll probably go with a integral transfer 7.3 ZF. I've played with the idea a couple times since mine gets stuck in wet grass empty.
'70 F-350 CS Cummins 6BT 10klb truck 64k mile Bahama Blue

Contact me for CNC Dome Lamp Bezels and Ash Tray pulls.
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eggman918
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Re: Have a few questions for a 67-72 F-250 build

Post by eggman918 »

The 'filthy beast' is heavy large bumper with ramsey winch 150' of 3/8 line + a 50' extension the crewcab full set of tools extra oil,gear lube and ATF as well as recovery gear and pioneer tools puss 2 full size spare tires all steel flatbed and 65 gallons of fuel in a 10ga. steel tank
Also FWIW that mileage is driving it like I stole it 100% of the time :woohoo:



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Steve

The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner

"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
Wood_Duck
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Re: Have a few questions for a 67-72 F-250 build

Post by Wood_Duck »

I’d originally had been leaning more towards the 3.9 but a few people told me that it didn’t belong much in a 3/4 and was better suited to smaller rigs. I do know a guy running one with NV4500 in a 77 Bronco pulling 37”s and manages 25mpg so he says. With popularity of the 3.9 these days they seem comparable in purchase price at least local unlike years ago when a 4BT was dirt cheap. I don’t want to drive a slug but I realistically won’t tow over 1.5 tons very often. I tow weekly, just nothing heavy.
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Re: Have a few questions for a 67-72 F-250 build

Post by eggman918 »

I have don a fair amount of towing the trailer i towed most was a small camp trailer `~3,000# and it was not an issue and i lost about 1MPG
However just after completing my build we and my daughter moved from Bakersfield CA. to prescott AZ. I moved two houses and my machine shop and at that time I towed 3 5K loads and one 8K load, and while it did the job those loads were too much for the truck itself yet still pulled the grades 2 55mph in direct. With a CGVW under 12,000# it will still pull a 6% grade between 60 and 65 mph, here in AZ. the interstate limits are 75mph for all vehicles and in N. AZ. 6%-8% grades are common so the 4BT gets worked hard. The first 50K miles i was on the stock 250,000+ mile internals with a HE221W turbo with a 6cm exhaust housing ta ~200HP but after blowing a head gasket I did a total rebuild and added the compounds and bigger injectors. I would agree with you that for a truck of this weight a 6 would have been better power wise but size/weight vetoed that for ME I decided to go with the 4 and build it for more power, with the trade off being a shorter interval between rebuilds in exchange for a better balanced package over all. When loaded I'm very close to a 50/50 weight distribution and with the Cooper ST/MAXX's in 295/70-17 the truck has very nice manners both on the highway at speed and on the trails,so for me it worked out.
Steve

The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner

"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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Re: Have a few questions for a 67-72 F-250 build

Post by cstoyer »

Ranchero50 wrote:First, find the Hiboy, then wonder how you'll power it.
Your profile doesn't specify what part of the country you live in but the statement from Ranchero50 is key. Finding a 67-72 F250 4X4 that's not falling apart may be difficult depending on your location.

cstoyer
68 F250 4x4
Wood_Duck
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Re: Have a few questions for a 67-72 F-250 build

Post by Wood_Duck »

Yea I can find plenty of 73-79 4x4s but a bumpside 4x4 is rare here. Much less a 4x4.
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Re: Have a few questions for a 67-72 F-250 build

Post by eggman918 »

The rarer the vehicle you are looking for the larger your search radius needs to be,we just sold a rust free '67 wagoneer with no engine,trans or T case to a guy in N. Carolina, he paid $1,500 for the jeep and $750 for the shipping but it was exactly what he wanted and he had been looking for well over a year for what he wanted.
I see Bumpside 4x4's from time to time here but the Dentsides are much more common, but finding someone who will part with theirs is even less common than finding one............Good Luck :thup:
Steve

The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner

"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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