How did that work out? I'm going to end up with one or two spare short beds, and I've thought about doing the same to make a trailer out of one of them.
I took all the wiring and all the lights off the bed, flipped it over and then I removed all of the various plates and shields that are not part of the bed structure itself.
I laid two 2 x 2 x 1/16” square tubes from the end of the bed deck extending about 2 feet past the front of the bed, n line with the six bolts that held the bed to the frame. The bed will ultimately be bolted to the frame through these tubes.
I took the axle & springs off the harbor freight frame, and then I flipped it over onto the upside down bed with the 2 inch tube. I kept four of the five crossmembers, and I moved the spring mount channels more to the center so they will clear the ranger wheels in the wheel well. The 2 inch tube and all the harbor freight parts will be welded together. If you consider the loading, they really don’t have to be very significant welds, just enough to keep everything from shifting.
I have some extra 1/8 inch diamond plate, so I am going to face the front of the bed around the toolbox so nothing looks unfinished. I haven’t mounted the toolbox yet, but my thinking is I’m going to create a slot between the frame and the bottom of the toolbox large enough to hold one of those skinny 14 inch trailer tires as a spare. I want to do it so the top of the toolbox remains even with or below the top of the bed. My concept is the tire will slide in and out under the toolbox, and I can secure it simply by dropping a bolt through the bottom of the toolbox through the middle of the tire. If the toolbox is locked, the tire can’t slide out.
Then I’m going to use the harbor freight pieces to reassemble the tongue so the front corners of the toolbox don’t hit the corners of the truck while I’m towing it.
I have an 88 bumper with the brackets. There are horizontal holes and vertical holes. I lined up the 2 x 2 tubing so I can bolt the bumper on the same way it mounted to the truck frame. I since realized that the bumper on my 87, the Missing Linc, is actually from a later model truck. So I may go find a matching bumper since I plan on painting the trailer exactly the same as the truck.
In hindsight, the only thing gained from the harbor freight trailer (which cost me $100) was the springs and the spring mount channels. I plan on doing two more of these, and I’m probably going to skip the Harbor freight trailer, and just fabricate the frame out of the 2 inch tubing and regular trailer parts. I usually don’t plan these things a lot, I get a concept, and then I throw them together with whatever is in the shed of miracles and the yard.
I got a 5 x 4.5 axle and hubs from another hundred dollar trailer, the one I just put in the post a couple days ago. I’m selling the trailer for more than it cost me, so theoretically these parts are free.
I plan on reusing and remounting the fender struts, the lights and wiring harness, etc.
Edit afterthought: the 87 has a 2 1/2 or 3 inch lift. I’m not going to weld the spring mount channels to the frame until I fit the axle so the ride height matches the ride height of my truck. That means I might have to space the mount channels down, or I may have to use a long shackle spring connector.
Edit afterthought afterthought: I had the 1/8 inch tubing and rust really isn't a problem down here, but I might bump it up to 1/8 if I lived in the Rust Belt. Also, I’m doing it where I can flop the trailer frame down and paint it all over before I built the bed on it. Yep, Rustoleum…
As always, this is for informational purposes only. This is to show what I did, and I don’t guarantee it will work for anyone else for any purpose other than a planter in the yard, nor that it is even safe for that!
I hope to finish it up in the next few weeks, and I’ll take a few more pictures as I go