Unported head quickness?

Specs on;

Cam
Converter
Gears
Tire size
just to rock the boat, and don`t get me wrong, I`m all mopar. ---- 1955 chevy, 265 plus .030, aftermarket 3 speed, oldsmobile rear end, 12" slicks, legal nhra superstocker, 11.39 when all is clicking right. not mine, belongs to one of my best friends, and my head man . 18 time national ex record holder. use to be neat to stand beside him when he dropped the hammer on it at 8400 to 9400----jfyi and a grins.