Highest LIft cam with 68 340 with stock intake and carb

johnnycuda said
391 rear gear with the stock 4 speed 833 trani no headers just 2-1/2 TTI X pipe Exhaust with an MSD ignition

moper said
Um. Yes.
If you want to provide more info as to the engine, the car, and what you do with it we could give you some ideas.