Ok, I know it's not the same,but I' m running a 4" stroke 408 through stock 1968 340 intake and stock 1968 340 exhaust manifolds best of 12.10 113 mph 4.10 gear with a very small tire. Best 60' 1.71. The only real "exotic" part Dwayne Porter x heads. My point is there is a lot of performance in the 340 intake and exhaust manifolds cars weighs 3645lbs. Pump gas motor. Aluminum heads/headers/better intake sure you can make more power,but don't discount what you can get out of those stock parts.