The official 6bt conversion thread

[mljjones67]

So do I need to cut them up at all, or just move it upto the new holes and bolt the mounts on to it???

[averagef250]

Sorry, yeah, you will still need to cut the towers down to fit the 4BT mounts (or have me mod them for ya).

[mljjones67]

It would be best if modified them for me. They are pretty important!!!

[averagef250]

You got 'er. Let me know when you're ready to send 'em out.

[mljjones67]

It could be a while before i have all the parts together!

[mljjones67]

Just as a side note on my truck. It does not have power steering. I will leave it like that. Power steering would be nice but to much work on this truck. I will however be putting power brakes on it. I will be getting a whole new disk brake front end from Patrick (460 crew) and the mated t-case. So I will be able to upgrade to the hydroboost. The pump that is on the 4bt I am looking at is the one you say I want, but if i am not using it for power steering just for the hydro boost could I sell it and use a different on just for the hydro boost? I wish there was an easy way to do power steering.

[xxxtina63]

Okay, I have a question. You guys seem to be working with F250's. Are F150's much different regarding install, aside from the divorced T-case? Also, can you eliminate the 2 piece rear driveshaft with with a one piece with this swap? I'm working with a '77 F150 4x4.

[averagef250]

I'd keep that pump regardless. The saginaw pump is the best one for hydroboost. You can run any pump you want, there's usually a V-belt accesory pulley you can use to drive anything off the front of the engine, but if you have the good pump I'd definitely use it.

[mljjones67]

I have been thinking I might go with the power assist for the steering. Just so I have a little help when towing and backing up. Exactly how do the power assist work. I hear they leak. Will I use the same power steering pump for the power assist?

[averagef250]

Yes, you can use the same pump for power assist. Tired power assist setups do leak. They're a real nice setup in good shape though. Both my '70 and '71 have power assist. If you're buying a disc front axle from Patrick, ask him if he still has any power assist stuff. I think he has a few setups he'll part with.

Robert, the swap is exactly the same for a '77 F-150 except you'll have an easier time swapping in a 5 speed and mated case since your truck's already mated. If you go with the mazda or ZF 5 speed they're 6-8" longer than a 4 speed/205 and should make it OK to run a one piece rear driveline.

[Mooosman]

Don't know if it has been answered yet, but what is the fully-dressed weight of a 4BT? More than, say, a fully dressed FE with power steering pump and A/C on it?

Would 1 ton springs be useable for putting a 4BT into a half ton truck? This would be for 2wd.

Nick

[averagef250]

FE and 4BT weigh the same, 550 pounds. Alternator and PS pump probably weigh pretty close to exactly the same since they are exactly the same.

a 460 weighs quite a bit more than a 4BT and guys stuff them in 1/2 tons all the time. Stock springs should work great.

[mljjones67]

I would love to pick this one up!!!!
http://cgi.ebay.com/ebaymotors/CUMMINS- ... 0130232387

[averagef250]

Those bosch pumps are nice. Something to remember though is mileage isn't a factor. 0 miles or 500,000 doesn't matter beans. If you want really big 4BT power the bosch pump like that one has is the only way to fly.

[mljjones67]

Yeah it would be nice to have but for $5500.00 I could have alot done around here to make more hp and torque than that. I am still trying to get ahold of the one I showed you earlier in the thread. I am hoping to get it for about $1500.00. We will see. question? What type of after cooler should i look for??? Thanks Mike