Bolt in cage?

Famous Bob has the correct answer... we did it like that on our dirt cars 40 years ago.

And, back then, a unibody car required a bolt in four point cage. There were no mig welders back then and finding a good welder to do your cage was tough... mostly had to pay up the wazoo.


Our tracks closely inspected every cage going as far as drilling an inspection hole to measure wall thickness (.125 was the spec). Some guys gas welded them and that was good. We had a army surplus WWII Lincoln gas powered rig. Hard to plug in an arc welder when your house has 40 amp service.