I have a bit of a problem, I have a 72 mustang convertible with a 351 CJ and a C6 trany. I have now 3.73 gears and 275 50 15 Ta's on the rear and find it just too low geared, I'm in drive by 30 mph. I do mostly in town driving but the odd highway jont. of about 150 to 200 miles I know this engine eats gas like I drink beer but.......thats a hole different topic. What I want to know is what gear size would you run keeping the same engine and trany, but want some gooood performance from stoplight to stoplight to keep my dodge freind in check and still have some good highway milage.