360 la

In addition to what’s been said about the initial timing, it wouldn’t surprise me if that carb isn’t a great match for a cam that provides a low-ish pulsing vacuum signal.

Also, don’t try for oem idle speeds.
I’d be looking for 800 or so, in neutral, as a minimum.

A stock low stall converter can also cause in gear idle woes.

You didn’t say if you’re running headers or not, but I wouldn’t consider that cam to be particularly exhaust manifold friendly.