i am putting the t-5 in my car and we have a shop in our town that makes clutches for different applications. they make a 10 1/2 inch disk for my application, they started making it when guys started putting v-8's in their s-10's. I'm going to use one on my 261 and t-5 tranny. i have a 4-11 posi nova rear in my 48 chevy convt., don't know how the ratios will work out, might have to do some switching around after i drive it and see. will let u know!