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Hi Guys. My name is Kent and I am a long time lurker here. I have several 240z project cars - none completed - but lots of ambition ....but that’s a story for a whole different thread probably. I started this car a few years back and, skipping to the point, I recently realized that I needed to take a step backwards in order to go forwards. I had replaced the floors and fabricated some new floor rails, but I realized that it would be nearly impossible to replace the front rails and firewall rust without stabilizing the entire chassis. Plus the rad support was repaired poorly by a previous owner at some point. Rotisserie was out of the question - way too much rust... Here she is on the completed jig .... a The jig was made from 2 x 2 x 1/8 tubing. It supports the chassis at stock suspension and drivetrain points - front swaybar, front crossmember, trans tunnel, and both side of the rear differential mounting point. I also added a support for the front strut tower, and across the door openings as I will be cutting out a lot of the firewall and the front rails. All the dimensions are available in the FSM. It is bolted (not welded) to the chassis. The whole structure is very rigid and I think that the firewall and frame rail replacement is going to zip right along. Here’s how she came together, in pictures .... hopefully this inspires someone else to get back on the horse. Cheers! e ;