I just have a receiver tube mounted to the factory plate. I found a pintle bolt pattern receiver tube, but only two of the 4 bolt hole locations matched up. I drilled another pair, and used the lower pair for a couple of shackles to hook the safety chains up to. I towed a 3000lb boat plus 40 gallons of fuel at 7lb/gal plus the 900lb trailer from Lake Cumberland KY to NE GA, climbing over the Blue Ridge twice. No sweat, no bends, no breaks. Plate + receiver tube rated for 10000lbs. You have to use a drop hitch with this setup. I use the one that adjusts with the load on the ball, using a knuckle buster or 3/8" drive tool. Going to have to chop off some stinger length and redrill the pin hole to shorten it up about 3" though. Convertaballs are real nice, too, if you tow with both 2" and 1 7/8" hitches. I think the max hitch uses both frame and plate mounting. I had this one on my gen1LS, and can make a measured drawing if you want one (I feel like Norm)...