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Old 12-25-2008, 06:42 PM
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Mouse Motor in an M38 Jeep

This is a maybe install after I finish with a GPW WW2 Jeep.

I've found that all the aftermarket parts are still around for the swap, using the original driveline.

Question is.

Has anyone on this forum done it?



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Old 12-25-2008, 09:10 PM
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yup, quite a while ago

Put a 327 in the ol ww2 jeep in 1966. Blew the transfer case to hell the first nite out... right after we found we could do wheelies in reverse and still keep our teeth. I would look at some alternate drivetrain system or keep your foot out of it. No problems fitting it in tho.
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Old 12-26-2008, 01:29 PM
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No problem doing the swap. I believe most of the kits offer or require fenderwell headers. And I think the weakest link will actually be the transmission; assuming it's the T-90. You'll most likely run into clearance problems with the fan; so figure on a low-profile water pump and electric fan. A big-tube aluminum radiator will keep it cool.
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Old 12-26-2008, 01:45 PM
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Go to for info on Jeep swaps and transmissions, that's there specialty! I think you'd be better off sticking a 231 (3800) V-6 in there. It uses the SBC bolt pattern and will be a huge upgrade for a Jeep and shouldn't stress the rest of the drivetrain too much. A 4.3L V-6 would probably be okay too. Of course a later model Jeep Cherokee 2.5L EFI four would be a huge upgrade from the old L-head or F-head four the Jeep came with! F-head has an overhead intake valve and in-block exhaust valve. L-head is a standard flat -head.

You could swap a Blazer drivetrain in, depending on which side of the transfer case the front driveshaft is on. You can't use an auto trans because of the short wheelbase. That's why Jeep created the CJ-7 -- it's around 10" longer in wheelbase than the CJ-5 and earlier Jeeps just so an auto trans could be installed.
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