Last I remember, you had everything for the 580 CID (pistons, rods, etc). So I would just stick with that plan.
Would you need pistons to use the shorter stroke 4.315 ? (with the 572-13 heads)

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1