Engine Dieseling - Options?

T slot is a decent "square" shape, mixture screws 1 turn out fronts, 1/2 turn out rears - idle is right at 1150/1175 -

one thing to note that the dieseling didn't stop, just "lightened" a bit, was gonna put a hose in the tank and blow some air in to try and mix the octane boost, figured what the hell, as I noted with the battery low I called it quits, previously when the battery was low it noticeably affected running, figured I needed everything to be good when checking things - I do know just by exhaust its a little rich - I will be dialing back idle screws when I get back at it, also thinking about rejetting my 670 and putting on there
Dude your idle is waaay too tall. Shoot for 800 rpm at hot idle, temporally plug the PVC that may be part of your problem. I assume you are running pump gas, if so forget about mixing fuels and adding snake oil to the fuel it will only make it harder to tune..
What do the plugs look like, always go back to the basics before you start making changes.
Again, automatic tranny or shifter car?