ok i have a 89 bronco with a c6 and 38in tires i have 3.55 gears now with a open dif, shes real slugish oh the line and gettin to 55. my 8.8 is about to need alot of $$$ put in new axles bearing gears ect so i have a 9in that is pretty stout besides the gears and nows the best time to go up so for better in town and a lil 55mph drivin with hills i was thinkin { 4.11 4.56 4.88?} i do not offroad much just a lil and i like to have ass off the line so whats my best bet with tryin to get a lil gas millage outa it cuzz now im dogin to get up them hills. thanks for any input yall have B)