You might have a plugged up carb. The Edelbrock carbs are sensitive to bad gas. Take the top off the carb and look inside. If you see a bunch of white crud floating around in the bowl then you know you have a plugged up carb. I had the same issue with my pickup truck a few years ago where the carb got clogged up internally and the truck ran really bad. It would start and run a bit but it would blow out black smoke and stall and didn't have any power.
