i just put in a set in my truck.everyone i talked to said to ut a plate under the floor board for each of your mounting points that you have to drill thru the floor. like the crotch strap and shoulder harness mount.they suggested a 6"x6" plate to prevent pull thru of the bolt basically the same plate they use for the roll cage kits.as far as the lap belt portion of the harness i was able to attach those to the stock seat belt holes.used the factory bolts from the stock belts. of coarse your buckets maybe different than mine so that might not work for you. later terry