Axles have three bolt patterns in all axles, 5 x 4.5" small ford, 5 x 4.75" GM and 5 x 5". axles are cut to length to match the housing, 31.52" passenger side and 27.31" driver side. housing ends are New Style big ford (Torino) with. 375" (3/8") bolt holes, refer to housing end drawing in Pictures.