So this is my junkyard rear end build. I bought a rear end from the junkyard out of a 4 cylinder fox body for $100. The axle is identical except the 4 lug axles and drum brakes but the fox rear has 3.73 gears stock with little or no abuse from the puny 4 cylinder. I cleaned up and painted the houseing, and installed my axles and brakes from the stock rear with new bearings, seals, pads and gear oil. It still has an open diff but the total investment for a 2.73 to 3.73 gear change was $150 I'll upgrade later when necassary.