I recently picked up an 8.8 rear, to replace the 7.5 in my 80 T-Bird. The rear has a trac- lok with 2.73 gears installed. I want to set the rear up for daily driving, but also want the benefit of a hard fast launch. The old 7.5 rear has really poor gears, around 2.65, killing acceleration in a car around 4300lbs. I have have a warmed up 302 in the car with a C-4 transmission. The trans has a stock torque convertor for now, but the trans was rebuilt and a trans-go kit was installed, giving some decent feeling shifts. The 302 is built with an Edelbrock Performer package cam, intake and carb. I also ran a dual exhaust with headers and flowmaster mufflers. The ignition is all MSD. I currently run a compression of only about 8.4 due to the 77 smog era heads. I picked up a set of 65 289 heads with chambers about 54.4cc. This will be moving compression to about 9.9, I currently have a set of rear tires that are 235/60/14 with a height of about 25.1" tall. I plan to switch to a 15" rim and go to a rear tire between 27"-28" tall. With this combination what gear ratio should I install? I was thinking between 3.55-3.73-4.10. I understand that 3.73 is a very popular ratio with an auto trans, but is 3.73 the ideal gear to install or is it the final ratio that I should be shooting for? I understand that based on the increased height of the tire, the final ratio is reduced. So(just for example)lets say that 3.73 is the ratio that I shoud be shooting for, would I want to install a 4.10 set of gears? Is a ratio of 3.73 too much for a daily driver? What is the ideal finial ratio for what I am looking for? Any help is very appreciated.