67 Barracuda gauge info needed

Cool. then you can test most everything.
Here's one more thread: This one has the resistances needed and where the needle should move.
https://www.forabodiesonly.com/mopar/threads/homemade-gauge-test-tool-c-3826.179517/
As mentioned in that thread, aftermarket sending units often don't match the original 67 sending unit resistances. :( Oil pressure and fuel senders being the most common offenders people complain about here. The fuel senders can be rebuilt - so that's at least one solution if you have the original.