The Stovebolt Site Forums The Shop Area Engine Shop Canadian 'Poncho' Rebuild

Ok, so I will try and track down a caliper like that, but in the meantime, I do have one of these.
[img]https://www.stovebolt.com/ubbthread...umber/22149/filename/20200902_233825.jpg[/img]

So, if I understand the tech article, I would take off the top ring, put it in the cylinder, just under the top ridge, turn the crank so the piston goes to the top to keep it level, and then use feeler gauges stacked up to measure the gap.