Strong steering vibration, missing badly and engine vibration at lights?

The car listed above is a LX model, with a carburetor.

Second owner, for two years.
Car presented with strong steering vibration, missing badly, and engine vibration at lights.

Full tune, suspension, alignment, exhaust system, and front mounts.

Car runs, less strong steering vibration, engine " hesitates" more than miss, and engine vibration still there.

Also, occasionally a faint gas smell, no visible leaks.

I suspect vacuum leak, a bad float? And transmission mounts?
Thanks,
Humbly so