Quote:

I decided to have Muscle Motors build me a new 540" short block. ...
I am going to sell my 496" short block. ...
I need to go to a 4.56 gear from the 4.10 ...

I don't understand why you would take the 4.10 gear out. What size slicks are you running?
I would think 9.0 and 150 mph could be close with the right head porting. I don't even have a roller cam in my 511.

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