Did Tecumesh ever manufacture a replacement ignition coil that could (easily) replace the one used with points and condenser like Briggs did? I've got an old 1972 HS40 aluminum block that instead of replacing the points and condenser I would rather switch it over to electronic ignition. We do these conversions on all of our old Briggs engine projects. The difference is that on the old Tecumsehs the coil is "internal" under the flywheel, while on the Briggs it is "external", mounted above and outside the flywheel.
Michael