3/4T (14B) U-Bolt Reverse Kit for 3-3/8" and 3-1/2" Axle Tube, 11" U-Bolts
Fits 3-3/8" or 3-1/2" diameter axle tube
Includes bolts and plates, u-bolts are 5/8" diameter, 11" long with 6" of thread
Commonly fits '98 and older GM 9.5" SF and 10.5" FF 14 bolts, also fits many Dana axles
For 2-1/2" wide spring
If you have a 1-ton GM truck with the 1-ton axle, you will need to have a lift that moves the springs down from the frame to create clearance for the ubolt plate. Examples of these lift types would be a shackle flip kit or a new deeper arch spring. A stock spring on a stock truck will have to retain the factory style ubolts because of tight clearance to the frame.