Idle Rpm High in Park, Low in Drive

So an update on this...

Listening to all of your suggestions...

I checked my crank and front cover for marks and found some on both. I remarked the crank because it was unreadable. Turned the car over with vac disconnected to check intial and it showed about 26*... really didn’t believe it and figured the crank had been removed. Found tdc for cylinder one, marked it, remarked crank, intial shows around 10* no vac. Makes more sense but again, setting timing this way is new to me.

I tune the carb for highest vac at about 15” and she idles choppy but nice at about 1000-1100 (afr in park is 12.8-13). In gear she drops to 850ish still idles beautifully (afr 13-14).

I reconnect vac, in park she jumps to 25* intial and about 1500rpm. In gear she still drops to about 850 but runs. This is with full manifold vac. My carb does not have a port vac provision.

Timing all in by about 3k at 34* ish.

She seems to run much nicer so I dont know if that was in my carb tuning again or what. At no point does she feel or sound like she wants to stall.

Obviously still having the issue of high rpm in park and dropping a lot in gear. I guess I’m wondering if this is acceptable, im still missing something or if I should just tune her without vac and leave it?