I hope you're not looking for longevity. I can count on one hand on the number of BB strokers that are still running after 1 year and still have fingers left. You want it to last? Do neither. Just .020 over and make up the difference in boost. There many mod motors making over 800rwhp on stock displacement. John Mihoveitz 2000+hp TT mod motor is only 283ci, you don't see him needing the extra cubes. Its not needed. Spend the money elsewhere.

-Mark