otisd85
Full Access Member
i have a 1990 crew cab chevy im considering a 12 valve swap into. i havent found a motor yet nor do i really know what im looking for. what are the differences in 12 valves? i know the 89-93 have a different ip than the 94-97.5 but when you look up a pump theirs a difference between auto and manual trans, whats up with that? whats the difference between the motor with 1 valve cover or 6? what other things do i need to know bout the cummins before i pick my donor.
thanks in advance
otis
thanks in advance
otis