well try a 78 sper and a 18/19 pinion. run for a few min then cheack the heat. dont get above about 160 deg f. or you will shorten you motor life. i run a novak 8.5 ss pro. with track temps at around 120/130 i run a 72/28 5min run i am at around 150. or you can just go for a fdr of about 5.5 to 6.5 it all realy depends on your motor temp. and you will have to play with it to find out about what gear to use. hope i helped.