I have something similar using a low first gear Aussie 4 speed (1st: 3.32:1; 2nd: 2.00:1; 3rd: 1.43:1; 4th: 1.00:1), 318 engine in a light weight car (3 series BMW), mostly used to road course track days, going from 3.45 in the rear to 3.15 made a huge difference in overall driveability, mostly working 2nd and 3rd gears on the track. Runs mid 14's on the strip.
