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70 Cougar 351C 4 barrel with 4 wheel disks custom interior getting new paint mild cam AOD trans
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How are you checking for opening up your secondary’s? You generally can’t get them to operate by just operating the throttle in park or neutral. Also on most carbs they will not open until the choke is completely off, there is a block that stops them from opening. You can check to see if they are clear by opening the primary’s with the engine off and seeing if you can open the secondary’s with your hand you will feel the vacuum unit movement but that is normal if you can’t move it look to someone see if the choke is not clear
 
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