I'm swapping a 5-speed into my auto 83 from a 91 but the hole in the flywheel is to small for the one on my crank which is a gm goodwrench 4 bolt main crate motor out of a p/u. the 91 has a 11.4 clutch but will a bigger one fit in the bell housing?

No the larger clutch will not fit in the bell housing.

You have a flywheel for the 86-up design with a one-piece rear main seal; but your motor is the 85-back 2-piece rear main seal.

You need a flywheel for a 83-85 Camaro/Firebird V8.

Don't worry about number of teeth, diameter, or any of that complicated stuff; concentrate on the application. 83-85 Camaro/Firebird V8. Just get one for that car.

If you just HAVE TO know, you'll looking for a 12.8" flywheel, 153 teeth, for a 10.4" clutch.

I have several of each. No they're not for sale. The same clutches fit both.

thanks for the info man. that is just what i needed to know. thanks