I have the Torker manifold that has a 1" spacer welded on top. Also have changed to a billet 750CFM carb. from Competition Carburation per Dave McLain's recommendation. I also using Pantera Parts Connection headers with a 3" collector and 3" straight thru exhaust pipes.
If you would like to read Dan Jones writeup regarding my engine click on the following link: ***************************/viewtopic.php?f=4&t=577
Mark