as i said in post above, chain is determined by year, width, pins and ,for lack of a better term pitch, either 3/8 or 1/2 inch. there used to be a kit that you could put in the 203 that was an eccentric type fit in the case and you could rotate it sightly to take stretch out of chain. haven't seen one in years though.
I listed my year, 79. I thought maybe all '79's were 2" despite some other variables. I am searching with part number 4x4 Roundup listed, but haven't found width yet. I saw pitch nomenclature in part numbers pdf he listed.
