heads... exhaust... intake

I would suggest you pay what good labor is worth. Trust me, you'll pay once to do it right, or pay once to do it, then again to do it right, and fix whatever else got broke in the process. BTW, why cahnge to V8 torsion bars? That's an expense you dont need. /6s are very close in weight to a small block. If your nose drops at all, crank the adjuster screw up a turn or 2. If you go to an iron big block, I would reccomend replacement. But not for a small block. Right there you can save $150 on the bars and $50-100 for the alignment.