im going to be rebuilding the engine in my k5 in the near future. i want it to be around 300hp and 350 lbft. and i want it to last a good 100-150k miles. oh ya and i want it to be as cost effective as possible( cheap).ideally i'd like the whole thing done for under 3 grand, including parts, labor and machining.what my best plan of attack? i was thinking either vortec heads or maybe something like darts, iron or aluminum i dont know, and some sort of tbi friendly cam.i want the power down low, and peak by 4-5k rpm. the motor will have the holly 670 tbi,thorley headers and a good exhaust.