First congrats on a good trip. Second, it does sound like a fuel delivry issue, but mechanical pumps and 5/16 lines will feed 500+ hp and run in the 11s. I would go over the lines you have from tank forward making sure ther are no kinks in the rubber or steel sections. Then rebuild your carb, making sure the passages ate clean and bleeds blown out well. Make sure the floats are set so the fuel just dribbles out the bowls at idle. Then retest.
