1966 Plymouth Valiant /6 & Holley 1945 carb can only get to idle at 1250rpm. How to get a lower idle without dying?

I cannot tell 100%, but I don't think so, no. Maybe if you could rotate 90 degrees clockwise and get a picture from that side I can be sure.
Guy never responded.

Another issue - the oil pan is rubbing on the center link. The back section of the oil pan looks the same between it and the earlier A body oil pans. Am I able to modify and dent it in? The pan's getting welded atm. The motor mounts look fine, not compacted - then again I have no frame of reference for how thick they should be though they are OEM. Bushings are all completely shot. I've read that shimming could help - but wouldn't replacing the bushings just make things worse (like the linkage sitting up higher?) What do you guys think?

EDIT: so as far as I can see, my options are (after replacing shot bushings and tie rod end boots)
1. shim motor mounts
2. shim steering linkage idler arms