Swapping to a 454 BBC

[Hojelly81]

First off this forum is awesome!!

So i just purchased my first humvee a 1991 1097r1, the 6.5 has a rod thru the block. I have a awesome running 454 BBC. I want to put it in my 1097 looking for any info that will speed the process up! It has the 4l80e transmission! Thanks in advance for any info or contacts to make this swap as easy as possible.

 

[Mogman]

First off this forum is awesome!!

So i just purchased my first humvee a 1991 1097r1, the 6.5 has a rod thru the block. I have a awesome running 454 BBC. I want to put it in my 1097 looking for any info that will speed the process up! It has the 4l80e transmission! Thanks in advance for any info or contacts to make this swap as easy as possible.

I think you will have a ton of engine overheating problems, the BBC makes a ton of heat and the HMMWV does a really piss poor job of getting air across the radiator, even that anemic 160hp 6.5 runs pretty hot, engines like the Dmax and even the LS gassers first have very well engineered cooling systems and also they are ALLOT more efficient as far as combustion so they turn the fuel into much less "wasted" heat that the cooling system must get rid of.
As far as installing it that would be rather easy, motor mounts, flexplate etc are all no problem, only the exhaust would be a little bit of a challenge.
But heck give it a shot, I have a 67 HP396 and a nice 454 sitting around here and the thought has crossed my mind..

 

[Ashley P]

I'd vote that the waste heat would be comparable.....and if it's in MN, that's less risky than TX.