New carb or current carb?

Man if is worken good & just want to fine tune it spend your $$$ on a wide band band o2 meter & fine tune what you have. Vacum secondary carbs are more forgiving of mismatch parts & lower torque motors but proper tuning will make any carb work great! I've gotten them both (mechanical &vacuum secondary) carbs. That's what id spend my $$$ on. Got my eddy 500 to work pretty sweet on my 65 GT & banished the 'BOG' there known for. Buy a gauge & fine tune it man!