Unported head quickness?

My two combos. I dont own this car anymore wish I did. 71 Challenger coupe. 440 stock bore forged replacement pistons, DC 284-484 cam, rebuilt 452 heads unported, Holley street Dominator, 750 Holley, 727 rebuilt, Turbo action rev manual vb, 3400 10 in convertor, 3.91 sure grip, 9x28 MT slicks, Hooker 1.78 Headers, This was a low comp engine regular unleaded. Best run 11.98 at 115mph, 12.00-12.20 car. sixty foot 1.66-1.68. My 68 Barracuda fastback 340, 030 over TRW forged replacment pistons, stock 340 heads spring seats and guides modified for dual springs, cam 305 comp magnum cam, stock 71 TQ manifold and TQ, Hooker 1.3/4 headers full exhuast, 727 rev man vb, 3400 10 in Turbo action conv, 4.56 sure grip. MT ET street 28-11.50-15 consistant 12.50 108 plus mph, 1.80 sixty.