Rodger

Nice van. Notice the HX Sandman in the background in one of the photos!
3.08 diff behind 308, M21 was reasonably popular back then. Most had the standard 3.36 but a few got 3.08 like yours.
Just a mental jog, the Rochesters had a thermal choke not electric, and yes they were buggers of things. I had a HZ 308 Kingswood in the early 80's, it did the same!

I'll send you a PM re the photos. I'm currently doing a Sandman book, and a few of those photos in the HZ section would look nice. All photos will be credited.

Byron