U-joint vs pot coupler

Yes, I can say if I hadn't done all the K-frame mods to stiffen it up, I wouldn't think of using a U-joint. And, the factory steering boxes themselves have a lot of play/slop. With the K-frame mods and a Borgeson box, I feel pretty comfortable with the U-joint mod.

I had a question regarding the collapsible steering column. I see the plastic sheer pins in the steering shaft and tube, and the perforated portion of the outer housing, all makes sense. But that bracket that bolts to the column and then to the dash seems pretty solid. How does that give way to allow the column to collapse? The '67 has metal shims, later models had plastic shims, but still the slots for the bolts are closed, does the whole dash crumple or something?