1969 Dart Street/Strip (Re)Build
Awesome job on that metal work!! Love the way those tires look! And that engine is sounding pretty manly too!!
I would get a fuel pressure gauge from Harbor Freight, tee it in right before the carb, tape gauge to windshield, and have a friend watch it while you step on it to make sure pressure does not drop off. Usually when power drops off on the top end its not getting enough fuel. Might be sucking a fuel line shut or something like that.