Datsun 240Z Restomod - Roll Cage Fabrication 

good video nice to see British men building a car well done look forward to your another videos

Looking forward to seeing the finished article on this! Top craftsmanship so far. Great work!

I built a roll cage similar to your design 35 years ago. It failed tech inspection. The support bar for the hoop has to attach to the hoop near your head, and attach to the hoop on the opposite side near the base, not the rear shock mount. The brace stays within the plane of the main hoop. I cut out the non-conforming brace, and made a new brace. That passed tech. Our design diverged in the floor mount area. I had an L plate the came down the inner rocker area, and on to the floor. The end of the roll bar sat on the floor, and was welded to the floor and up the side plate. Your roll bar sits farther back, which is good for seat travel. The main hoop support change I referenced in the first paragraph will also be farther back, giving more room in the passenger compartment. We didn't have to remove the cage to do the finish welding after tacking. We had holes in the floor that the tubes passed through to drop down to the ground. Once welding was complete, we slid the four L brackets over the holes after raising up the cage to its final position. You might consider putting a reinforcing panel or tube within the rocker panel to tie the back hoop to the strut bars that support the front shock mount. This is easier done if you have to replace the rockers due to rust. You can still add a door bar higher up. Take a look at the Bob Sharp Racing 240Z cars from the 70's. These were SCCA GT2 class cars, and the cages were a work of art. Really a pain in the ass to get in and out of, but safe. They used those front strut bar supports you plan on adding to your chassis. Bob Waar's book about Datsun race car prep shows exactly what I'm talking about. Look at pages 133-135. Sharp's team used three bars to support the front shock mounts. One bar is in the wheel well, and passes through the inner fender well to tie the front of the rocker to the rear of the front shock mount. Cheers! I love the idea of a modern twin cam six in the Z. Oh, one final thought. All-in weight was 2238 pounds for the early Z.

Great craftsmanship. I want one like this for my B13!

Great video James. Cage is looking good 👍

I was like where are they going with the coffee...

What is the copper spray paint you throw down before the weld? Is it copper head gasket sealer? You can weld directly on it?