Well for the most part feel that large air pockets aggravated by the anti-siphon valves were the source of my running out of fuel in the carbs. At one point was going to replace all the fuel lines but not sure where to go for that. I've since put that idea on hold. For now both big blocks will open up at WOT. That is once they're warmed up. Thinking the port engine choke is out of adjustment as it stills coughs during throttle ups but never dies as it once did prior to this post.