There's nothing about your parameters that would steer me away from building a 451. 440's make good power with stock manifolds, why not in a lowdeck block. Mine appears nearly stock and makes over 500hp. subtract headers and substitute a DP4B, and I'm right there in your wheelhouse.

I'd go with a solid flat tappet cam in 250 - 255 duration range; use a set of Eddy or source heads (if you're truly looking for the stock vibe), and an 850 holley up top, and I guarantee you'd be in the ballpark and be reasonably streetable. Getting an honest 450 horse out of a stock stroke 383 will mean a much more high strung motor that won't be as pleasant to drive.