BubbasanJohn,
w8ye is correct in that the important thing is that the engine doesnt quit .
The 3.2 like many other engines will have a mid range burble and the best you can do is to tune most of it out . You need to find the sweet spot between transition and a clean mid range .
1) Be sure ignition timing is set at 28 to 30 degrees BTDC (throttle should be wide open if you have the mechanical advance)
2)Warm the engine up by flying a 5 to 10 minute flight , Land
3)Throttle the engine up to full throttle , set high needle for max RPM and no more ,do not peak and add any extra needle , Max RPM only !!!!!!
4)Throttle the engine up to the point where it runs the roughest in mid range throttle.
5)Making only very small needle movements ,adjust the Low needle in (leaning) until the mid range just begins to clear up.
6)Check throttle response , if the throttle response is clean with no hesitation stop moving Low needle
7)If throttle lags or hesitates richen Low needle only enough to regain good throttle transition.
Once Low needle is set for a good transition and a fairly clean mid range go to wide open throttle and set High needle for peak RPM again.
If after setting the carb by the steps above the engine is hard to start cold or hesitates when trying to throttle up when cold ,allow the engine to warm a little while when starting or richen the low needle only the width of a screw driver blade .