progressive linkage would be good for the street.Most of your driving on the centre carb,all three open at full throttle,if it is adjustable you can have three carbs open at the same time.I've heard that on tri-power some people have disabled the idle curcuits on #1 and #3,but way back I didn't know about this,so it wasn't done on mine.It could get rich in traffic.I wish I could remember the jetting,but sorry I can't. The cool factor of tri-power on an inline can't be beat
