David, sorry I don't have a Facebook account.
As for your H, over the past 75 years any number of things might have been done. Aftermarket parts, parts from a later model H may have been installed, or maybe IH sold them as a kit for retrofitting.
Did you know that the Cinderblock moved? There is a link to it on the old site. I check in there and the Cowboard from time to time.