Hi, I'm restoring an '07 6-speed manual limited coupe. Hoping for experienced input, concerning a final drive swap and mod. I would like to replace the stock 327 final drive gear set with 307 ratio for MPG and top cruising speed increase. Hopefully I could locate another Crossfire or MB vehicle with the 307 ring and pinion that are a direct fit for my housing, IF I knew which models to target my search. I know there will be low end torque reduction and the need for speed-input ECU programming but that's what I'm after. It will not be used as a race car. Given the low first and second gears of the NG370 trans, and a quality LSD, I suspect it will still be quick, stable, faster on the long straights and yield better HWY MPG. I could also reverse the whole process anytime if desired. Any and all comments are welcome.