Thank you for the input. No, I have no affiliation with NDD and this IS my own design. I've been doing this (machining/fabricating) full time for 22 years now. You think a plate under each "end"? You could actually quite readily jack on the "ends" of the center tube now. I thought maybe we were talking about a center jack point? Either way I can do whatever you want if you happen to order one. I have everything here in house including the powder coating. Located in Southern New Hampshire. I can put this on my website. I didn't want to violate any forum rules by saying the name of the business etc.
Hi. Yes, the tube would be plenty strong enough. Though you make a good point. You wouldn't want to gouge or dent the tube. Especially if made from chromoly is actually quite thin. Maybe it would be a good idea to incorporate some kind of "lift point". As in a plate or pin welded on for the jack to interface with. I'm always open to suggestions. Thank you for your interest.
Neat cars, always like them as a kid.
Here's an interesting project that I just took on for a fellow forum member who has a build in progress.
240sx top, conquest middle, tubular bottom with 240sx rack.