Upgrade to our heavy duty 5/8 diameter u- bolt kit. They are 9" tall from the inside. Sold as a set with washers and nuts. Factory U-bolt plates will need to be drilled out and or modified to accept these or you can pair them with the Heavy Duty U-Bolt Plates.

Factory Ford 8.8" and 9" rear ends are typically 3.25" diameter 

Currie/Camburg Fabricated housings as well as F250/350 are typically 3.5" diameter.