Small block?

Sanderson has a shorty, and I've never had a problem with their fit.

http://www.sandersonheaders.com/make...2_67novamm.htm

Hooker 2122 (black) and 2122-1 (ceramic) are full length, and pretty good units. Hooker usually guarantees their fit.

Check them on Summit under part #'s HOK-2122 and HOK-2122-1.