My car weighs a little over a ton with me in it, huge difference in weight to power ratio at that point. I just swapped a b18b1 into a little cx hatch and the thing f**kin scoots. Mustang gt makes cost an arm and a leg only to have a fatty to roll around in. I am only out a little over 2 grand so far car and swap, which ain't too bad considering i have double the power the car came with. What do stock mustang gt's run a 1/4 in roughly? Could they out handle a civic in twisties? Don't know anything about mustangs.