67 F250 engine choices

[asrfixer]

Hi, all. I have a 1967 F250, in which a P.O. replaced the original engine/trans with a 400M/c6 out of a 77 Lincoln. I am thinking of replacing the engine with a re-manufactured or crate engine, as opposed to rebuilding/upgrading the 400M 2v , due to parts availability issues(?).
this model is a camper special, with power steering, but no brake assist (which I'd like to add).

What would be a good choice for relative ease of swap out, and improved power & reliability. I am not going to hot rod it, just use it as the work horse is was designed to be, just updated slightly. I plan to stay with the C6, unless there is a better idea for that, also.

I am trying to avoid clearance issues with the exhaust /steering /etc. I may use a LMC kit to lower the front end, but not yet decided.

Any suggestions?

Thanks in advance, folks!

[cep62]

If Its a clean install , I'd replace it with a 400 , otherwise a 429/460 will bolt up to the tranny.
Beware of the the torque converter snout can be different on older big blocks

[asrfixer]

Thanks for the reply. Not sure what you mean by clean install, but I don't see any cutting or bending done to get the 400 in there. Can't tell yet for sure, but the motor mounts look original.

Is it hard/expensive to get replacement or upgrade parts for the 400M? I know they share some like parts with the early 351's , bu don't want to wind up with an unsupportable motor in use. As a minimum, if I were to keep the 400, I'd want to replace the intake and carb with either a 4V or a simple F.I. setup. I do love the Duraspark for reliability and simplicity.

T

[cep62]

I've never had a anything but a stock 400 , but there are some forums I've read that said
with a cam and intake , and porting the heads they're a real powerhouse, plus lighter than a big block.
I like the 429s but I swapped a 400 into my plow truck because I wouldn't have to change the mounts ,the oil pan,
the exhaust and the accessory drive brackets.