If you can post particulars such as static compression, induction, exhaust, converter and gear, Ill be glad to help with a recommendation. ...and what engine again?
Good morning. Here’s the particulars:
68 340 4 speed. 3.55 gear. 10.5 to 1 pistons. Edelbrock air gap intake, 800 CFM carb, stock HP exhaust manifolds. 2.5 inch exhaust.