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Thank you for the information/testing for the valves.
I use machine screws in vacuum hoses all the time, in my opinion they're preferable and cheap. Most of the vacuum plugs these days split on the end in short time. I buy new machine screws and screw them into short pieces of new vacuum hose. But I was letting you know that the one pictured was for ported distributor vacuum advance,which I wouldn't run,so plugged is good. But I need to see where the vacuum advance is hooked up now to see if it's on manifold vacuum. Machine screws are not tapered and the threads aren't deep enough,so they don't split or cut the hose. Pick up a few different sizes to have an assortment on hand.
I've printed them off and have them all in binders already. I like paper manuals over electronic ones - but the electronic ones have been my lunch break reading materials. I'm an old journeyman partsman so service manuals, parts diagrams and such are my wheelhouse.
I have a big stack of Equipco parts bins in my shop - three of the drawers have my machine screw collection (imperial, metric, etc). This screw has most likely held for a decade so it should be fine - I'll just keep a few vacuum caps/plugs in the glove box so that Murpgey's Law doesn't strike...
We have a large assortment at my work's shop that we can pick through as needed. It's the same stack of parts bins my new door hinge pins and bushing came from. But I might have to grab a kit to keep some in my home stock. Partsman habits die hard.
