I broke the rear driver side upper shock mount, have a new one. I cannot find in any of my manuals how to remove the gas tank on an 85 k5 with a trailer hitch and skid plate around the tank. I need to remove the tank to gain access to the rivets to remove them to bolt a new mount to the frame. Does anyone have experience in this area? Would greatly appreciate any help. Dorucol 85 k5, 350, 700r4, 14bolt ff, corp 10 bolt.