If my memory from 40+ years ago serves me correctly, the box-section station wagon frames we used for dirt track cars were made of two C-sections, one slightly smaller that the other so they could nest together, and they were skip-welded together on the top and bottom. Of course, we always chopped about a foot out of the center, fish-plated the joint back together, fabricated a roll cage that looked like a bridge builder's nightmare, and still developed stress cracks. Of course, blasting down a dirt straightaway that resembles the craters of the moon after a few laps and then bouncing around a slightly banked turn four times a lap might have had something to do with that! Evan can attest to how difficult it is to keep a circle track car in basically one piece!
Jerry
