Although I have the hooker Super Comps, and like them, and have had no problems with them, there is also the Ram Air Manifolds that you can get. They are repro's of the original style RA Manifolds, the best over all clearance and fit, and they can be ported for a little more flow. BUT, they are expensive...

http://www.ramairrestoration.com/factoryheaders/index.htm

Price wise it would be the Headman's, then the Hooker Comps, then Hooker Super Comps then RA Manifolds.

I'm sure you'll like any of them!

Brett - 67 Drop Top 455!