ORIGINAL: Dr1Driver
Do not confuse ABC with some of the non-ring Iron Piston engines that you may encounter.
You're showing your age, Hoss.
Are there still any of those being manufactured?
Yep, most of the Enya line up to the .40 size. And the Fox 35 of course but anyone who buys one of them knows what they need.
As for running in an ABC rich, I did a notorious experiment on a new ABC by running it extremely rich for 45 minutes to see what happened. The pinch stayed exactly the same as it was new from the box, the piston was unmarked and the only thing that showed signs of any running was that the lower rod bush was polishing nicely and only on the upper half.