My specs. call for .016 , 47-53 dwell.
Fortunately for us vintage Benzheads,
a point conversion is readily available, short $$$, easy to do, and they never ran so well.
Mechanical switching has it's dis-advantages and require maintaining.
The new coversions run flawlessly.
There are both optical and Hall effect systems out there.
I personally like the Crane Cams opti units.
Less than $100. [ Formerly Allison]
Petronics [sp?] sells the hall effect ones.
No need to change the coil. The stock one is fine.