4.30 vs 4.56 gear

While Fishmen is correct, it depends what you want the car to do.

If you lean towards running 660 then slap the tallest tire you can, paired with the deepest gear set you can run with out blowing the hides off- Then become ok with never driving on the HWY and just have a super fun car that kills at stop lights.

Or rethink what you want the car to do and build accordingly.