Back in the mid 80s I got a 2.6 Forklift motor, it was non shaft with no jet valves. To me it seemed to an early G52, 2L engine with more displacement. These are the small valve heads, the original FL carb is a single barrel that visually is a 2 barrel from the early cars, it just does not have the second barrel machined through.
I installed that engine in a 2nd gen Colt. I had ported the head as I do on all my motors, made a real nice car. I lost track of the car after it's second owner since I built it.