I imagine the new owner's will put out a better product.
But since it looks like you have pulled your old "500hp" hemi, just have it upgraded (rebuilt with more HP in mind).
That should save you lots of money using your block, heads, rockers, intake, etc.

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