Thanks! I think the pedals are kinda nifty too and they are in extraordinarily good condition. I didn’t want anything to happen on my maiden voyage that would change that.

The TPI measurement on the pedals, which I believe to be original to the bike 40 years later, was done with a Mitutoyo thread pitch gauge and the measuring calipers aren’t fancy but have been confirmed to be very accurate compared to a 0-1” micrometer so I’m satisfied with that part of the equation.

Upshot of all of this, I screwed in the Suntour Cyclone pedals and I never had a thought that something was off. It didn’t take too much effort but more than getting the spindle threaded in by hand.

I wrote a bunch of other stuff that I deleted but I didn’t lose any sleep last night about my course of action.