What size clutch for a T5 Behind a Y Block

For my 26T project, I am running a 272 Y block with a T5. To adapt the trans, I have an NOS Offy Y block to flathead trans adapter along with a new Offy flathead to T5 adapter from Speedway.

The new adapter uses the original Ford clutch linkage. So my question is what size clutch should I use, 9", 10" or 11"?

I may upgrade to a 312 someday if that means anything...

Here is a quick pic...




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I put the biggest I could in my "56 P.U. Works great!

Fenderless

 

Late 80s astro van clutch,11in should do the trick.

 

What spline is the trans? Sometimes that makes a problem..

 

The T5 came from a very early 93 S10 and it has 14 splines. My real question is what is the right diameter clutch to run?


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10"

 

Use whatever size fits your pressure plate the best,14 spline common to s10.Ford pressure plate I assume?