Welcome to our site, Marc! Neat truck! Our 1972 9500
was more like your truck than our '65. You have the monster V-6 though. Wait 'til you run that baby down the road ... let me know when you do so I can buy stock in whatever gas brand you buy.
My '65 had the "little" V-6 -- the 305 -- and it didn't exactly sip fuel ...
Mine actually did better in both performance and fuel economy when I ditched the Stromberg Carb and the governor and switched to a Holley 350.
Looks like your truck was built with a front mounted pump. And some of the primer components almost like they were Barton?? I've seen some of that before...
Mike B will probably recognize most of it. Or some of the other guys.
Anyway, all of the stuff for the auxiliary cooling, and the priming stuff, can come off. You will be happier without all than non functional stuff in your way. I had a line like that running from my pump to the radiator. It started leaking and being a problem so I removed it and brazed closed the connection to the radiator. Same with the vacuum primer -- leaving it on there unnecessarily complicates the engine compartment, provides more entry into the system for failure "vectors" and it's just ... not needed anymore.
If you feel guilty about scrapping that stuff, don't. But if you need to assuage your guilt, you can check out the SPAAMFA
] web site and see if they have a way to list it. I listed all that stuff I removed from my truck that wasn't needed anymore and got no takers ... Maybe yours will find a home ... ?? Hopefully (but don't hold your breath).
Even on my '65, that was still in its fire tanker configuration, I didn't need all that stuff under the hood. Besides, my 1945-vintage Darley 500 GPM pump was tired, had cracked the case twice, had a worn impeller and just would take suction at all unless started with positive pressure -- basically, it would only pump water from the tank. It wouldn't take suction from the pond or anything, so why bother with all the primer gear? And it never pumped at high RPM for more than 20 minutes anyway so I didn't need the leaky water connection to the radiator ...
Your truck is no longer a fire truck so lose all that gear and don't feel bad about whatever you choose to do with it. In my experience, there isn't much demand for those parts. But who knows?