With a junk 318 that had 2 cylinder that were egg shaped I ran 15.7 using this combo. 340 cam used stock, headers, TQ carb, recurved dist a set of 1.88 heads that I really should have kept the 318s they were in better shape and last 3.55 gears witha open rear end By the way the car ran a 15.9 with stock cam shifted at 4,500 Total cost next to nothing got the parts from my stock or my brothers