First off not sure if you know but the C-4 is a pain in the balls when you buy a converter for it. Since there are like 4 different converters. Big bell,small bell,pan fill case fill. each tranny needs to have the right converter. I have a 2800-3200 stall for a C-4. I have no clue witch one it may fit. I found out the hard way hope you don't go through what I went through. Good luck.