Holly 750 vaccum secondaries

[mogulmike]

I have 2 carbs both 750's. The first one came on the car and I thought my car was running to rich so it was rebuilt. Car still ran rich so I bought a brand new one 3 months ago .... come to find out the reason why my car is running so rich is because I need a 650. Don't know what used carbs go for but I'd be happy to trade a 750 for a 650 or sell each of the carbs out-right. These are after-market carbs with a duel line feed and double hung bowls. The orig carb that came on the car has the following on the horn: 3310-4IL 3035 Will sell each for a fair price.