J mod that trans and 13s easy. Throw a good converter in there with some sticky tires and you could see 12s. Very possible on a bolt on PI car with a tune, jmod and stall.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.