[blykins]

Lots of stroker crankshafts out there for the FE's now. One of the most common combinations for the 427 is to do a 4.250" stroke, which puts you at around 482ci.

The Sidewinder intake would be a nice dual plane intake to use for the street and you could even use an aftermarket EFI, throttle body style system on it.

If you don't have cylinder heads, a nicely ported set of Edelbrocks work great.

Your block setup with a Scat crank/rods, Diamond pistons, Edelbrock heads, and a hydraulic roller cam (if your block is drilled for it) would make a very powerful and streetable engine.