i have a motor alot like that... 4.15 crank, about 10:1, 0.039 quench, performer heads, 231/237 duration ~0.560" lift cam w/1.6 rockers, the lowly "performer" intake with a TQ, 1 7/8" headers, stock converter and 3.23s. it idles like stock and revs to 6500, but runs out of power around 5000. it is fun as hell to drive! i buy 89 octane and it won't ping, i attribute that to the tight quench. it doesn't overheat in the desert and gets about 10mpg. i last installed a 2.76 rear for freeway running, which is nice but killed the low end. next is a 518 trans and 3.73s, and definitely a bigger intake mainifold, and maybe a 250 shot of n2o