on mine only the rear mount was moved...what year is your truck??i didnt know blazers had a spare tire wellIf I move the rear mount the axle will be too far back. I would have to cut the floor behind the wheel well for tire clearance. I don't mind cutting most of this truck but I still want it to be mostly waterproof.

. The one on the left with the green paint, I did as a strip. I made two cuts, I should just have made one cut like the one on the right.
