welcome to the garage Rick, there was a post recently where someone supplied some info on how those worked
yes, it's a washer setup, which won't be in the manual because it was an optional accessory and not real common .... looks complete enough that you should be able to cipher things out - and rather than a pump in the bottle, I believe there should be one hose that connects to that extra fitting on the manifold so it runs off engine vacuum like the vacuum wipers
and for your truck model designation - leave off the "C", that wasn't used until the 60's, it's just a 3600
Bill
