You can use any chevy car bell housing V8 and L6 are the same. There are 10.5 and 11" clutch bells also. either will work.
The car bell will have a hole that is 4 5/8"
A truck bell will be 5 1/8", do not use this.

m20 wide ratio trans
m21 close ratio trans
m22 close ratio trans

Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com