I am building a XP class 240z (Chevy 350 engine swap essentially), and have a question about a harness bar. Since I am not planning on doing any club racing, I am wanting to hold off on building a full cage, as I feel I can spend that money elsewhere currently. However, I am wanting to fabricate a crossbar to mount my harness to. The 240z, has these holes in the sides (behind the rear seats), where the factory roll bar would have been installed on racing chassis.
Here is some pictures of someone else who has fabricated the bar I am wanting:
I was wondering what the correct plate and tubing size is. The gentleman who built that bar used 3/16th plate for the ends and the tubing was 1.375 inches, .062 wall, 1.25ID. Just wanting to make sure I get everything to make the crossbar correct.
Also, my harness is a V mount with a bolt on end. Would it be legal to drill through the center of the tube and mount it that way, or should I weld a mounting point to the tube (3/16th plate) and mount the harness to that?