Since you already have the 4.56 gear in the car, I would run it at the 1/4 mile and see where the finish line rpm ends up. I would not worry about 7400-7600 for less than a second. Just have the valve springs for it....
If it ends up needing 4.30, then change them.


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