i need to buy a new clutch and the tranny says ys1 on it which is anywhere from 90-93 b17/b18 right? well i've been reading up and i read that one of them has more splines on the input shaft then the other (90-91 vs. 92+) so how should i know which clutch i need for my car? if it helps any my second gear seems fairly long, takes me right around 65mph...thanks