hey guy's, well last year i drove the d150 with the mostly stock 318 beside's the normal bolt on's ( long tube header's, performer intake, 600cfm carb) i want a little more giddy up & go. so im getting a comps XE256H cam (thanks to a member here) I dont want to yank the motor & do a complete rebuild but what else could be done to get a little more power?? i am swapping to 355 gear's which should help.. i am kickin around replacing the head's with a set from areoracing, i dont want to go throuw the hasle of the magnum head swap, i do got a pair of 89-90 tbi head's but last time i checked it was well over $500 to get them rebuilt.. any info would be great guy's