Ditching a quick fuel carb.

Yes it's a vacuum advance dist. It's plugged into the port on the passenger side of carb metering block per direction that came with carb. It's a mp igniton orange box I think it's grounded good I had this all running last fall but the carb has always been rich. I just broke in the cam but the engine screams as soon as you fire it up. I could'nt find a vacuum leak on manifold or under carb. I was thinking the choke was sticking but with the carb pouring fuel into the engine I just fouled out the new set of ngk uridiums I just put in. So I'm hoping to get another carb to try after I change plugs again and before I end up washing out the rings. The timing is around 32 degrees at 2500 rpms set the best I could trying to hold the choke plate down to keep it from screaming. And turning the distributor and trying to time it with a lite all at once.
Once the engine started I did'nt want to shut it off till after the cam was broke in. So I had to hold the choke plate on the carb almost closed and keep the rpms up where they needed to be for cam break in. I was thinking a choke or vacuum leak but can't find a vacuum leak yet and it's getting old changing plugs when they foul. If it's a vacuum leak I don't know that my timing is correct as I had to use the choke plate to keep it from screaming and to keep it from stalling If I closed it to far. But could'nt get it to just idle. And it is a new coil I have two just in case. When it first fired up it screamed but sound good but now it's missing and spuddering I pulled plugs and they are all fuel fouled as before when it would act like that.