What size clutch?

[aGood'olBoy]

I'm not sure what size clutch I need and I'm hoping you guys could help me out. My truck came from the factory with a 305 and sm465. Currently it has a 350 in it. I know it needs either a 11 or 12 inch clutch. But other than pulling the transmission and measuring it I'm not sure or any ways to determine size.

 

[slowgo]

I believe they use the same flywheel. Assuming you have an 11 now. If you turn the flywheel you shouldn't have a problem running a 12.

PITA but I think you could also count the ring gear teeth and cross reference it.

 

[aGood'olBoy]

Thanks for that i wasn't sure if there would be any interference with the bell housing. I probably will just count the teeth on a lazy sunday