I have a CJ2A on a 79 CJ5 frame, that had a Buick 3,8 mated to an sm420. The 3.8 was pretty close to the firewall as things were already. Have a friend who is getting rid of a Chevy 3.8 that's in a Jeepster....how much difficulty would it be to drop that into the CJ2A in place of the Buick 3.8? Will the distributor be in the way? I'd check and measure, but the body is off the frame right now.