I ordered these lower control arm relocation brackets for my 1988 Camaro, I was wondering which holes I should use to connect it because there are two holes. My main reason for getting them is to eliminate wheel hop.

 

Depends on the rest of the car.

Start out with them in the hole that puts the rear axle end about ½ - ¾" lower to the ground than the body end with the car sitting on flat level pavement and adjust from there. Obviously, ride height will affect the proper choice.