I think you need heads, cam, and exhaust. It's doubtful that your engine can breathe well at all. It's just about stock except for the intake. Probably has small valves and smog heads. You probably need some kind of custom chip as well. Those mods will probably take at least a full second off your time slip. My $.02.
Rev
------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.
|