But there is a chance it would die while the line is priming i would have to continue to pour gas in the vent while holding the throttle and keeping the rpms above 2000. Seems easier and safer to have the carb and lines full already
What carb are you using? Most float bowls hold enough fuel they will run with no load plenty long enough to fill the lines. Even if you have an OE style fuel pump.
If for some reason it does run out of fuel, just let it die and figure out why the pump isn’t pulling fuel.
Seems to me you are making work and spending money for no reason. In fact, if you just want to fire the engine and break it in, use a 5 gallon gas can beside the car and run a hose under the car and into the gas can. Fill the bowls and start and break it in. Much cheaper and easier than what you want to do.
