RE: Note: Shadel/Nelson YS Piston & Liner Installation..
flywilly,
I had the same problem on a few used SFs/RFs I have cleaned up. The rod was indeed stuck on the wrist pin. I sprayed a couple with WD-40 and soaked the others in metanol/Heet with the piston inverted to loosen them up. Both methods worked.
Good luck.
Terry in LP