if you're running trw pistons make sure they're the lightweight ones not the heavy 2355s. or run kb237's.
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With the motor came new sealed power rockers/shafts...am I asking for a disaster?
ditch the 509 cam. old tech and a lazy cam for the street. try the lunati voodoo 60304 or 60305. I ran the 60303 with stock rockers and pushrods. they've went to a new part number system for their cams but you can figure it out on their website.
step up to the 440source stealth heads or eddy rpm heads. you'll be able to run more compression and swt your engine up for quench. win win fpr a street car.
