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TR6 74 1/2 tr6 idle and vacuum

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Ok, think I may have it. I must have been reading your mind as I pulled the top checked the needles and readjusted from the full lean. Set them about 3/4 to 1 turn and they were pretty close. Took it for a test drive and had no problem with idle. A little of the exhaust popping is back so I may be a little lean still. Took it up to 4500 rpm and it felt strong but power was starting to fall off. Back to the garage and it still idled well. I found another run on valve in my spare parts so I will swap that out. I'm going to leave it for now but may still go to different carbs.
Thank you for your help.
 
This is the throttle bypass valve diaphram. If anything is wrong with the TBV it's usually because this diaphram has lost it's flexibility. It's about a 12-13 dollar part and may be responsible for the popping on deceleration.
TR6TBVDiaphram.jpg
 
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