I have ben attempting to track down a hesitation in acceleration when I accelerate hard. Somebody told me one time to check the timing. It is a 68 Camaro with a 350 bored .060 HEI ignition with an Accel. 9.5:1 compression S/R Torquer heads 67cc, RPM Airgap intake, 600 cfm Edlebrock carb, and a Comp Cams 268H cam with 218/218 and .454/.454 lift. The current timing is 12 degrees, and when I rev it up it stops at 20 degrees at 2500. I have never played with timing so I am really unsure as to what I should have. Thanks for any help.