After reading in Dave73's resto thread about reversing the wires in the stock flasher connector to get the newer led flasher to work I checked the pin out on several flashers at the local Canadian Tire. For all led specific flashers I found you had to reverse the ebody flasher wires for it to function. Dave used an EF32 which is a two blade with a ground wire out the top which works well. Up here in Canada I found the EP34 is much more widely available and is the three blade, square variety (and half the price of an EF32). The three pins are labelled 'B', 'E', & 'L'. For battery earth and load I guess cuz that is where they go. If you reverse the wires on the stock connector, you will get the correct wiring for B & L, and the connector fits. Then crimp on a spade lug to an appropriate length of wire and attach it to the remaining blade on the flasher and screw the other end to ground. The square body fits into the holder on the ash tray, and it will flash from 1 to 6 led's.
Just FYI that might help someone.