To cope with the 440, we scored an 8 1/4 rear from a '68 Dodge A100 van in the junkyard. The bare housing measures a whopping 56.5 inches-not including brakes and axles. We need to narrow it 6 inches to arrive at a 50.5-inch width. Once the axleshafts and drum brakes are installed, the drum-to-drum dimension will be 55.5 inches, just what we want. The fingers point out the two close-spaced differential studs that indicate the top of the Mopar 831/44 housing. By contrast, Ed and Mando Sutton point out that the Ford 8-inch housing has no up or down thanks to its symmetrical differential bolt pattern.