dies at low idle speeds, when put into gear and when stopped.

[oldred85]

I just got this 85 c10, its in great condition except she dies when the rpms drop. For example when I put it into gear or come to a stop. If i hold the gas to keep the rpms up she stays on but its a pain slipping it into neutral coming up to stops, and parking is a nightmare.
My best guesses are old fuel, carburetor, distributer, or some sort of vacuum leak. This is my first time owning a classic so most of whats under the hood is new to me, any other ideas on why its dying on me?

 

[cadillac_al]

A vacuum leak will cause that but it could be a lot of things. I wonder if the ignition and carb/choke is tuned to spec.

 

[83Stepper]

A lot of things missing here from the post friend. What's the engine rpm when coming up to a stop or idle? Auto or manual trans, any other "odd" things happening while she's running like sputtering, chugging, misfiring?