i personally think youd be better off rebuilding a stock tbi. without any major info on what heads those are those will kill that cam and suffocate it with a tbi head. id say rebuild yours if its in ok shape. or go all out and get it machined new crank or stroker crank, then you can bump up your compression maybe use your stock rods if they are true. vortec heads can be found cheap just check for cracks, otherwise search craigslist for some 113 heads, dart torquers or something aftermarket thats not too big. if you bump compression and want to keep tbi you may want to opt for a head with a bigger CC instead of 64cc like that one.
that cams large i had one that size, didnt like it, not street friendly with the tbi even with a tune, i then opted for a 421, 444 cam and lifter kit from summit. tuned nicely and works great on the street.
if you have roller stuff in your block already you could even use an lt1 cam and some roller tip 1.5's or 1.6's it really all depends how much you want to spend, how much you want to replace, what the use of the truck is, etc etc. you cant just throw parts together and hope it works theres a bit of planning involved. if you dont know how to build an engine you could learn, if you dont want to learn then id say just get a reman unit and dont complain.
