Power Tuning

[PMS]

I gave my son a 72 GMC 1/2 ton long bed for his 16th birthday. We installed a new GM crate engine. He has finally got the engine broke in, the 1000 mile mark. The engine is a 350 HO with 330HP with 380TQ. We installed a 3.42 posi and a 2800 stall converter in front of the turbo 350 with a shift kit. We installed the GM aluminum intake, Holley 650 dual feed vac. secondary, headers and HEI distributor. I don't think the truck runs as good as it should. I know we are dealing with a 4000 pound truck but shouldn't it destroy the tires from a dead stop? Sorry about being long winded but my question is where should I start to power tune this combo? Is there a web site or a specific order I should try? Thanks for the input.