383 Wont Idle with new to me 800cfm DP. Idles and runs ok with Edelbrock/AFB

Thanks for the advice guys. I was trying to get the timing at different rpms last night and my timing light started acting stupid. I have a Mac tools digital dial back to 0 timing light. I set rpm at 2500 rpm and 33 advanced as I did before. I went to bump the throttle to 3000 and the timing light was instantly set on 45. I did not move it. I relived the mark back up and it said 50. I brought it back to idle and had 33 at idle. Mind you I am not hitting the adjust button on the timing light. I will grab my old rotary dial and recheck.
As far as the carburetor, I have the secondaries acting as an air bleed which is what drilling holes in the primaries would do and I am able to completely close the primaries which in my mind should allow the mixture screws to work. They do not have any effect. I need to make sure the mixture ports are completely clear. Maybe try another metering block off of another carb I have laying around? I will post what I find. I am back at work now though so it will be late tonight