I noticed in a few of your videos your running gas. Are you running gas 1/4 with no pump or alky? I wish pavement was bigger around here because Id like to give it a shot. That being said I can offer much advise on whether a pump is gonna be needed in 660 or not. My first thought is yes, but if it we me, Id use big bowls (maybe even weld 2 together) big needle/seat, big vents, etc in an effort to not run the pump. But if you have to run a pump its not the end of the world. Just make sure the carbs are setup for it, use a good fuel line for the pulse (so it doesnt colapse) and go for it. Its not the end of the world. I would however carry a spare pump.