[RichardJ]

1st question. How many NEW threads are you planning on starting for what may simply be a tune up?

Did you check the float? Stick it in a container of gasoline and see if it floats.
Don't over tighten the manifold bolts. If you have a small leak, you can usually fix by loosening any nuts/bolts that have been over tightened. Doesn't sound right, but try it.

#1 - Dwell. Point contacts must be clean and smooth or the feeler gauge will give you really bad dwell readings. Use small metal file or just replace the points.

#2 Timing, but with idle rpm @600.

#3 Mixture screw adjustment, but with idle rpm @600.

Any adjustment you do that increases idle above 600, reset idle to 600 and redo that adjustment.

Point adjustment with feeler gauge works just fine, you just have to be very careful till you get the knack.