Getting closer to having the back half car to the point of purchasing a center section for it. I have 4 quotes from builders but they all have different gear ratio suggestions. 3 Strange centers vs 1 Moser. Gear recommendations from 184.108.40.206,4.56 and 4.88. Rear is a Ford 9 inch with a set of offset length 35 spline axles. Moser axles and 13 inch drum brakes.. The car is a 70 Buick that will be in the 3200 lb range hopefully. TH400 transmission and a 464 with Aluminum Stage 2 heads. 3 inch exhaust fed by TA Stage 2 headers. Tires are MT 31x18.50x15 on widened Buick rally rims 15x14. I am not planning of racing this car as it's going to be a more streetable car. No huge cam or such. Want to be a dependable ride to drive on Sundays etc. From all the gear ratio pages, I keep getting 3.89 gear selection. I am just hoping that it accelerates well and not be a slug, but I don't want to run 3000 plus at 70 mph. I'd rather keep the TH400 and am not wanting a Gear Vendor unit at this time. A 200 or 700 trans isn't going to happen either. The guy that suggested the 4.11 is really a good guy and stands behind his work. I have friends that he did work for. I just don't want the higher rpms like the 3.90 in my other car. He suggests a Detroit Tru Trac posi unit, Strange center section and I forget the gears name.Am I paranoid or will the 4.11 be too much? I know I have a tall tire,but it's eating at me..