put a t5 onto my 67 250, what clutch.

[fortytwo]

Howdy.
I hav a 67 c10 with a L6 250 in it. the flywheel is setup for a 10.5 clutch. I want to put in a T5 in it. I am aware of the modifications i need to make to the tranny.
MY biggest problem is finding a clutch that will fit. the t5 input shaft is 1 inch 14 spline i belive. I could just buy a s10 clutch disk and use the original sachs pressure plate but i would like to reduce the pedel pressure if i can.

Any suggestions?

Thanks