1954 Chev truck Carburetor Question

[Darthintel]

I just purchased a 1954 Chev 3100 5 window truck with all original drive train this weekend.
The engine starts up great, but doesn't idle very well without a little choke being applied. It accelerates very good - just transition from idle is bad.
When coming to a stop the engine will stall. But start right up.

The previous owner told me the carb was just rebuilt. From looking at pictures, it appears to be a Carter YF - I don't think this is the original carb. I think this is off of a 1957 or later chev vehicle or Willys jeep.
Any information on this carb would be helpful.

I'm thinking it's a vacuum leak and will check the following.
1. The base of the carb there's a plugged vacuum line. most likely it was for the wipers. It looks like it's plugged with putty. I'll check this for a leak with carb cleaner.
2. The idle mixture will be adjusted to see if it could be improved.
3. Check the distributor vacuum line for tightness / any leaks.
4. Spray carb cleaner around the base of the carb and intake to check for leaks.
5. Remove carb and check all sealing surfaces.
6. Check intake manifold bolts for tightness.
7. Take to shop - (last resort)

Any other suggestions?