Speedmaster MidRise Air Intake Manifold

I know it's been a while . Meant to do this several months ago. But so many people get in these forms , go on about something. Then they just leave it hanging. I didn't want to be that person. So for what it's worth, the speed master intake is a P.O.S. Ended up removing and installing it 3 times. Had 5 or 6 different carbs on it. A couple Edelbrocks , an AVS , a couple Holleys , and a quadrajet. It liked the quadrajet the best. Driving it with the quadrajet worked really good. The problem was at an idle and slow speeds. When I was climbing around adjusting things my hand and a rag ended up covering the carb. That's when I realized you could block off the choke housing and it would just keep on running. I couldn't actually see the problem . But using propane I found there is a hole or crack under the runners around #6 or #8 cylinder. So the stock 2 barrel intake and carb went back on.