The engine does not have to be running, you can look down but it is kinda hard to see how much they are open in relation to the transfer slots which are easily more visible from the bottom.



Quick fuel makes this nice bracket so you dont have to take the carb off every time to make a small adjustment.
http://www.jegs.com/p/Quick+Fuel/743841/10002/-1

1968 Barracuda 360/727 11.20 @ 121 mph 421 rwhp
1985 Harley Sportster Bobber
2006 Ram 2500 sport - The Cudahlr