A fellow member on another board builds a system similar to caltrac, but it has more adjustment and the bar is solid. He is currently building them for an S10, but is willing to look into doing it for a LUV also. He is scheduled to come up this weekend for some parts and I am looking for a stock LUV so we can get the dimensions. The plate for the u bolts is being planned for multiple mounting holes to accomodate rear end swaps. Here is a pic of what the set up will pretty much look like. This is NOT a done deal...
