No SG, a heavier car always has more mph than 60ft times. My truck runs 9.0s at at almost 150mph with a 1.29 60ft. When I run a comparable ET dragster. Their 60ft is around 1.19. A light car that runs a 10.00 will mph less than a heavy car running a 10.00. Your 10:1 540 putting out 700 hp is real good. I think everything you have is working properly. You probably can fine tune your car and pick up your times alot. I think a 1.80 straight cut plants would definatly help.
If you run any 1/4 mile I'd go with a 4:88 gear and if you race just 1/8 mile Id put a 5:14 gear in to get it moving. Those soft sidewall tires are killing your 3400 lb car. A set a stiff sidewall slicks wll help those 60ft times.