Sorry Al. In the article they were describing frame contruction difference between Ford and Chev. While Ford used open channel with X member, Chev chose to gain rigidity by making a box section rail. GM's thought was that they could build in compliance, thus improving ride quality, by having rails that "twisted" along their length. The article's contention is that the Camaro/Nova is way more rigid than the rest of the frame and that the difference in torsional movement "always" (sic) caused the fram to crack just behind the point where the two parts were joined.

I don't own my '41 anymore so can't check it for sure, but I've heard it's still on the road. That's about 20 years of service now with the clip. We had fish plates at the joint that were about a foot long. I'm just curious what Don's mech. engr. thoughts are.