Thanks for the link. So there’s a diagnosis manual as well as the Fbody manual and service manual ? Wow. I thought a couple of 1000 pages was enough.

But to answer your question if I’m looking for a a vacuum leak, wouldn’t I want to check all vacuum fittings? For example, if the hose that supplied vacuum to the brake booster was split it would suck air back to the carby
Wouldn’t I check the whole system?