I’m not really sure how much of a failsafe the oil switch can be in this particular situation.

The electric pump is feeding a mechanical pump....... so even without oil pressure, and the electric pump turned off...... the motor still runs.

Just eliminate one more item that can cause problems...... the oil pressure switch.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads