Hesitation issues - need help

10* initial isn't enough timing. Turn it up to 16-18 and see how it reacts. Then tailor the mechanical advance to hit your total number.

I bet it has pretty significant rpm drop when put in gear from your p/n idle RPM.

Solved to some is a horrible tune up to others. If it smells like a fuel truck out the tailpipes at idle, it's not right.