THIS ADDS A BLOCK ON YOUR FACTORY 5.5" BLOCK. THE UBOLTS ARE SIZED FOR THAT. 

THIS KIT WILL NOT WORK RIGHT ON TWO WHEEL DRIVE TRUCK

THESE KITS ARE TO REPLACE YOUR EXISTING BLOCKS, NOT STACKING WITH THE ORGINAL.

2" or 4” FFS Rear Lift Blocks (Kit) 

72-93 Dodge. 

5/8 Squared  U-bolts 

Blocks