I just checked the prices in a recent Jegs catalog. Holley 3310=$264.99, quick change kit=$14.99, springs=$11.99. Electric choke = $49.99. I didn't see a secondary metering block, but I would guess about $50.00. Total price for everything $391.96. Price for a Quick Fuel 750 vac. sec.=$526.99, $135.00 more than the 3310 with the options I recommended. As previously noted 3310s can be found used for between $25.00-$100.00. Price for a rebuild kit=$22.00-$25.00 depending on where you buy it. Add in $3.00 for a can of carb cleaner and your still under $30.00 to go through it. FWIW you can buy a Holley jet kit for $50.00 that has a pair of every gasoline jet from 64 to 99 in it so tuning shouldn't be a problem. I am not saying that the 3310 is the right carb for everything, but it is the closest thing there is to a truly universal carb and at a very reasonable price.