With an aftermarket block, why stop at 4.25 stroke?

572ci /4.5x4.5 bolts together just the same, but oil pickup may need to go external
(which, once you have the aftermarket block is really easy given most aftermarket blocks have
provisions for that built in).....Unless the appearance of the oil line is not desirable, which is understandable.

There are even shelf/stocking pistons for 572, both hemi and wedge with normal street compression ratios.