Seabeaowner uses the correct terminology for dwell, %, not degrees, I've said degrees from the year dot, no idea why !
50% is the way to go for a points gap of .015."
I've had old Fords that have the points at .025", dwell for them around 40% I seem to remember.
A bit of discussion is good education, great forum this one.
Regards all, Terry
East Yorks.