[FED 387]

We made ours from Super Strut channel--- same stuff electricians use then mounted them vertically to the same upright ribs they screw the plywood to---we then used 2 pieces of threaded rod about 5/8 inch and double nutted the rod to the slots in the channel spacing them to correspond with the bolt pattern of the wheels/rims---next we used a large piece of plastic stock to protect the rim which is mounted against the wall with the bolt protruding thru it and the plastic--- then we just used flange nuts we tightened down against the plastic and rim really tight- use a ratchet NOT FINGER TIGHTEN the nuts - it clamps the wheel to the wall isn't going to go anywhere IF you do it right---for a little bit of insurance we put a short piece of angle stock running horizontally snug underneath each tire to prevent it from sagging down--- its hokey and cheap about $25-35--- but it will work if you do it right--- buy yourself some slick covers like Jegs or Summit seems to cover the slicks from the sunlight when the *** end of the trailer is facing into the sunlight--by the way I think your walls are 3/8 inch NOT 3/4 inch-FED 387