The 7.5 is a very tempermental rear end. Ppl have blown them with a semi-stock engine and a good launch. And some ppl are running low 13's in their v6 with the stock 7.5. All depends on the individual rear end.
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD