[Alan Roehrich]

Provided you can run an OEM replacement block, such as a BowTie, and you're willing to spin the thing up, a 4.5 bore 9.8" deck BowTie block with a 3.76" stroke crank (396/427) gives you 478 cubic inches. You can get real close to a 6.7" rod in that, allowing you to run a really light piston with a good ring package.

A set of 990 castings for the heads, since it says OEM castings and no aluminum (you'd need a cylinder head guy capable of Super Stock national record holder quality work). Probably a Super Victor Dominator pattern intake, and since they allow any single four barrel carburetor, you could talk to the guys at Quick Fuel about a really big Dominator pattern carburetor.

I see no valve train rules, so I'd be looking at a big core (54MM) roller cam, 0.904" roller lifters, Jesel belt drive and shaft mount rockers.

You have a really good choice of parts when you run a combination like that. Of course, with that big bore, short stroke, and long rod, that's a high RPM (8500 or higher) and wheel speed combination, not a "dead hook" combination.