[Alan Roehrich]

The later big blocks are not great about head gasket life. You'll want to use ARP fasteners to put the heads on.

You really need to have the heads converted to adjustable rockers, especially since you're having a considerable amount of work done on them (valve job, milling, etc) and you're changing head gaskets.

The bottom end of the late big blocks is reasonably robust. The pistons, however, will not hold up well under any real amount of boost, and especially not under any appreciable detonation.

The camshaft in those really kills power. So does the stock exhaust. Both are pretty big power killers, and will go along way to negate the effects of a supercharger. If the exhaust doesn't go out on its own, a lot of the boost is just the supercharger working against a small exhaust lobe and a crappy exhaust system. You make heat and boost, but not much power.