1975 CJ5. I bought a mildly built Chevy Vortec 350 and bolted it to a rebuilt 350 Turbo transmission today. Seems like I could move it back at least 10" without any major issues. Should I do that or leave it where it is?
Well no matter what, you are going to have a short driveshaft. So the farther back the motor goes, the shorter the driveshaft and the more angle the driveshaft will be running. But, give yourself plenty of clearence for a fan. It definitly looks like in the pics it needs to go way back.
If I were dropping a SBC/T350 combo into a CJ5, my main concern would be rear driveshaft length/angle. You're not going to have a lot of room for a rear shaft so you don't want to waste space up front.
I'd probably drop the grill/radiator in place and put the fan on the engine. Then, I'd position the drivetrain so there was about 1-1.5 inches between the fan and radiator and mount the drivetrain in place. Probably have to modify/fabricate the tranny crossmember to make it work.
Even scooting the engine forward like that, I think your rear driveshaft is going to be about a foot long or so.
'80 CJ5 w/AMC360, T176, D44 w/Detroit 4.56, RE 4" YJ lift and 35s..
It you are using a big cap HEI you should put it in place and leave about 1/2" clearance between the cap and firewall. Even with a small cap HEI, you will not be able to run a stock fan and fan clutch. You might get away with a flex fan and small spacer. Electric fan(s) will be the best bet.
I agree, bolt the grill and radiator in place and move the block forward leaving clearance for electric fans and you will minimize the issues with the rear driveshaft.
1978 Cherokee, 360/T400/QT...5.3/4L60E/NP241C in the works...
I agree with what BESRK said. I just sold a 78 cj5 I put a SBC 350 and made the mistake of moving the motor back to far. I then had to cut out my motor mounts and move everything up and go with low profile electric fans with a short nose water pump so that I could fit a drive shaft properly. It was still very short and at to much of an angle for me with only a 4" suspension lift. Also be prepared to use a cv style ujoint.
I've moved the motor and transmission back quite a bit and everything looks pretty good. Two questions. I need to raise the front of the motor a bit and right now the engine is pretty close to level. How much of an angle can be tolerated? Also, how much offset can you get away with for the rear drive shaft? Thanks for all the replies!
For starters, get rid of that long water pump and replace it with the short version. Depending on the motor mounts, you can get by with 3/4" on the fan/radiator clearence without problems. IMO, keep it as far forward as you can.
Thanks for the input but I think it would be better to keep the engine as far back as possible for a good weight balance. I've posted new pics here: Jeep CJ5 pictures by Celticdude52 - Photobucket
I had the rear driveshaft shortened by five inches and the front one lengthened by the same amount by Driveshaft Specialists in West Sacramento. I'm hoping to be on the road by Sunday!