I raced a guy in my mach 1. He had a 72 mustang with also a 351C 4V with about 138000 miles on the engine, a stock c6 he put on and stock 3.00:1 gears. I have a posi track, 3.50 gears and a stock engine with about 35000 on a rebuild and a 4 speed. We took off and I had about 1 1/2 maybe two car lenghts on him out of second gear, but towards the top of third, he caught up to me and then passed as I shifted to 4th. Could someone please help explain where the top end is on my car? I don't think the gears are big enough to cause so much of a problem are they? Is there anything quick I can do to get some better top end pull (4500-5500)?