Lakewood J Bolt Traction bars

[Firstgenz28s]

Hi All

Looking for some help or info on the proper adjustment process for Lakewood traction bars with the j bolt set up. The bars are bolted in place and I am noticing too much clearance between the bumper and the leaf spring. I am new to this set up and any help would be appreciated. The bars have two u bolts, front and rear. The traction bars came off the vehicle prior to the restoration and i don't recall an issue.
Thanks in advance.