I think I've finally found the solution (read:easiest). I was scoping a new TrailBlazer the other day, didn't like the mounts, but looked at it again and came around. I think this is the solution I'm wanting. Now, the only question I have is after I build these is to weld them to the frame (easiest) or drop the tank and build the front and back of them out of angled metal so they can be bolted to the frame. What do y'all think?