My best quarter mile time is 14.08! I have and auto with 315/35/17 rear tires and suspension. I was planning on getting the frpp 4.10's with a trans cooler and also some other minor rear end things like 31 splines. How much can I expect my quarter mile to drop! and my best 60ft time was 2.108 I usually run 2.1 -2.2's! I ususally make a run on stock tire pressure and then put about 15 -20 psi in the tires. When I run stock psi my 60 ft sucks but my 1/4 is lower! when I lower the pressure it is the opposite.( I KNOW THIS IS COMMON SENSE BUT) I was thinking If I lower the pressure with gears and get good traction then maybe I would run 13.6- 13.8??? And also what other mods along with the gears and tranny could I do to improve times! Thanx