Electric pumps are great at flooding the crankcase, and causing the carb to run way too rich. Unless they're run through an oil pressure sensing switch, they just keep running, even if the engine stalls. Why mess with a system that worked for decades? Mechanical pumps are reliable, and simple.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!