Header collector stand, not perfect, but works very well and I made it in a couple hours with a plasma cutter, mig, and a bridgeport mill.
Made the collector stand to make these, working on equal length long tubes for a LS in a 240, passenger side tacked up and ready for tig. I was able to get the front 3 tubes within 1/2" in and the last one is 2" shorter.
Also made my own mounts for the engine, its sitting on Nismo mounts right now, I wanted to see if I could, but I'm feeling a little nervous about what's going to happen with the extra torque. (don't worry, the mounts will be fully welded and gusseted before I start the engine, everything is just tacked for right now)