i have what i think is a sm465 4 gear out of a 76' camper special. i have it in my mud truck now but i am having a hard time finding a np 205 case that will bolt up to it. i thought i counted 35 splines on the output shaft and the case i have now only has 28 (i think) i am new to chevy stuff so can anyone tell me what adaptor and t-case i need to complete this swap. any advise is very much apreciated!!