wasn't it the ram or the 3-way that was not compatible as well between pre2k and 2k+ cockers? IIRC i know the block is different. Then again it's been what 7 years since i custom built my cocker... that i sold for $200
I just sold ALL of my cocker stuff to sniper bob... i had a ram and all the internals too. I still have a budd orr VHS on how to tear cockers down though