ok i got the springs to rev up to 4000 rpm. do i have to make any other modifications for my motor to handle that kind of rpm's. my buddy told me that i have to get new valve springs. is this true
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94 12V
, #4 tst fuel plate, cranked star wheel, dual side by side 5" stacks, AFE stage 2 intake, snow performance water/meth, 370 marines, 191 deliveries, stage1 turbonetics turbo, 12mm ARP studs, 60 pound valve springs, TC lockup switch, leveled out,