I would be more prone to looking at 3.73's instead of the 4.10 especially if your doing any HWY driving. You'll get a very nice response from the switch of 3.27's to the 3.73's. The Pulley would help, as would porting the blower/intake. Cobra owners are seeing 30 rwhp from this procedure. Long tube headers will only net you about 3-5 rwhp but will add over 25 ft lbs of torque. Some some areas to look at. I would start with gears 1st.