The stock LT1 bottom end can withstand 500 - 550 Horse. Your fine. Sorry if you did not understand that much or any of my post but honesty, you should do some research on head porting and cams cause its your money and your car and you should know what your getting yourself into. I didn't recommend any of the more radical cams like the 306 comp cam or the Gm 847 cause they may create a streetable problem (although many do have these cams on there everyday driver but its a little too radical for most). Definetly do some research and ask questions to people who currently have cams and head work your interested in. Good luck to ya.
John
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