Here's a thought...why not just build a 440? any year will work, bore it .060 That gives you what???? 453ish cubes??? Then call Summit and order a set of pistons for it. Not sure what heads you are going to use. I'd guess depending on the rest of your set-up, stall rear gear and such you could pick a cam. For street use those extra cubes will probably just blow the tires up. You can go old scholl and get a 400, use a 440 crank and chevy rods for a 451, those run good. The problem I see is there really is no "cheap" engine build. Especially when a machine shop is involved. Some body here uses this as their tag line and it is true
"cheap, fast or reliable" pick 2 because you can't have all 3".