Thanks, Marco.
This was indeed Chris Tanner's chassis. I was a beneficiary of some of his kit after he passed last year. He had a heck of a collection. The Tamiya body is lost to the ages, but it's good t know what will fit it.
Chris hosted the Tyler Slot Car Club, in Tyler Texas, since it's inception until passing last year.. He was an avid, avid scale model racer and without reference, could give you facts and figures of all scales of racing. He was our own private version of Slotblog. lol. After each weekend's 1:1 racing, he'd type up a summary of the results for his best friend, Dave. Then the Club would gas about it at the weekly meeting. His model and scale car collection was not just slot car related kit, but also of RC and models both earthbound and skyward. it was astounding in scope. That he would have a chassis built for him to fit a specific Tamiya model (of which he had loads) just to run a few laps then put it on a trophy stand, is pure Chris Tanner.
The slot racing world lost a good one in Chris Tanner. We miss him daily. Thank you for providing the provenance, Marco.
All the best,
Scott