528 solid would probably work well. The 557 and 509 will require a good stall (3000+) and 3.91's or better.
Also if you want to run the 509, be sure you have headers, a good dual plane intake, 750DP, along with the stall and gears, otherwise it's going to be a DOG out of the hole. TRUST me on that.

[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!