If you feel you HAVE to do something , stop going to near WOT at 35mph in 4th gear. What gear you have in the rear? With 3.70:1's in 4rth I'm below 2000rpm.
Turn the secondary adjustment screw IN 1/4 turn.
YOU can do whatever you want,it's your carb, but if it is running pretty well now your at the point where you want to start tuning in 1/8 turn mixture screw adjustments then drive for a day or so.
OR just leave it,the weather is about to change and todays "perfect" will not be Decembers "perfect".
When your ready to go beyond seat of the pants you need a fuel mixture indicator (Air Fuel Ratio) a Tach and vacuum gauge and somebody to drive the car while you take notes. Then you need to learn how to read plugs. Then at some point you will want to tune WOT so you will be going to the drag strip or DYNO,it goes on from there.
Sounds like it's fine as is.................
Last edited by cyclone03; 10-11-2015 at 11:38 AM.