I ran the stock MC for a long time and the braking on mine sucked. I saw many write-ups using the E350 MC, so I tried it. It worked great, but the other key was getting rid of the stock YJ prop. valve. I think the Vette MC bolts directly to a CJ, but not a YJ without some work. The e350 MC needed a little bit of the ears ground off, but then was a piece of cake. It may also depend on the year of YJ, not sure. THe one I had was a 1995.
