I had posted a few times prior saying my 71 val had a bit of a lope at idle and had done all of the other stuff with not much difference. Buying a spare 1920 yielded me a good carb all around. Good float too!
Spare holley metering block! Removed the big plug on top this time and cleaned that passage that leads behind the main jet. Nice smooth idle now. I think it even runs better while driving....don't think the economizer on the old block was working properly. Either way what a difference! Spare carbs pay off!
