I wonder if the 8710-15 bell is shallower than a bell for an LS T56. Or would that be what the extended pilot is for? I know that the LT T56 has a shorter input shaft. Summit still has remnants of their 8710-15 product page and that states that Pontiac engines "may require a special pilot bushing."For pilot bearing i used a McLeod extended unit.
And i used a McLeod slave throwout bearing.
For the bellhousing i used a McLeod 8710-15, it has been out of production for at least 10 years