Hey y'all, I got a 1994 Chevy Suburban weighing in at 6500lbs. It has a 350 V8 5.7L engine, and a stock 4spd. .70 4th gear O/D transmission. 3.42 differential gears (looking for 4.10). I live in the mountains/hills of PA. currently im getting 10 city and 15 highway roughly.