400/426 Stroker. Ever heard of one?

There have been thousands of 400 blocks built into 470's using offset 440 crankshafts (that's what you did 30-40 years ago) no issues with using a BBC rod that creates .018" extra rod clearance. I see no reason that it won't workout fine. This engine will easily spin another 1000 rpms before it runs out of cylinder head like a 500" engine combination would.

Tom