"Tried cranking some more even used starting fluid,"
This would seem to rule out a fuel issue.
"Checked spark to plugs 3 and 4 and 1. good spark. Used test light that goes between plug and plug wire."
Test light??? I am not familiar with this. Do you mean spark checker?? If so will the spark jump a 1/4" gap? When was the last time you removed the dist and checked the points?