If it is the tractor part you are working on, parts should still be available. Normally I'd suggest going to Case/IH parts site, but for the last month they have been updating their parts data system, and it is rather spotty at the moment. I tried the IH & Farmall 350, and C-175 engine, and nothing would come up.
As far as engine parts, they should be the same for both models. In fact, probably all the same until you get to the axle housings, possibly the gears in the tranny because of different tire size on the utility, and row crop model.
Being it has International on the hood, that should designate it as being the utility model. If it had Farmall, that would mean they used the row crop model.
There should be an aluminum plate on the bell housing. Model (but you already know that..), and serial number may be a big help, along with it being the utility version.
Filters, and ignition parts should be easy to get through Case/IH or NAPA. Anything else through Case/IH or aftrmarket. Individual part numbers will be your friend, if you can find them.