J head 1.88 vs 2.02

Let's not get to carried away! The engineers put 2.02 valves in the 275 HP ( more like 310Hp in 71) 340's for a reason. On a healthy engine you will see more flow at low lift and low rpm with a bigger valve. If his valves and guides are fine and he can get away with just a seat regrind fine use the 1.88. But on a +.030 over 360 with headers, a good intake/carb, and a cam that has at least 224 @ .050 I'll take the 2.02 every time.