I installed a Class III/IV one-piece hitch on my '92, and it only involved drilling two 5/8" holes, per the instructions. The frame is tough, but not impossible to drill.
| | I installed a Class III on a '92. It required drilling (I think) 4 holes | about 1/2" in diameter. It was not easy drilling by my drill bit was not as | sharp as it could have been. I drilled smaller pilot holes first of course. | The tricky part was there are two c-frame adapters/spacers that I also had | to install. It was difficult to maneuver everything into place working | alone as the hitch is somewhat heavy and awkward. If you have someone to | help you hold it while marking for screw holes and installing it that would | help, but a Class II probably won't weight quite as much anyway. | |