The Mack truck

I went to a show a few years back, and I joked that maybe I'd see a Brockway, it was the only name I didn't see. Well over 300 trucks, but that was the only absent nameplate. A hell of a show, but I walked away missing a few percent.
Brockway has a devoted but small following. I know they have, or at least had pre-covid, an annual convention every summer in Cortland.

Didn't brockway use mack cabs?

Always been curious what the difference was?
Mack had bought out Brockway several years before they shut them down. So there was probably a great deal of consolidation of design resources. I'm pretty sure the fenders on the one I pictured are fiberglass replacements intended for Macks.