So my friend just ordered the new whipple front fed kit for his 2015 gt. He already has 3.73's in the car from the factory since it has the performance package. I mentioned that he should go down to 3.31's at that power level but then i started to think maybe that can be too rough on his stock mt-82. What do you guys think? What rear gear would be best for stock tranny and 650whp. Should he just keep the 3.73's so the tranny doesnt explode? Or is 3.55's maybe a safe middle ground?