Hi flow electric fan

My 1964 Valiant slant came with a front pusher fan from a M-B and no fan on the water pump. Some gomer wired it direct to IGN on the key switch and melted the switch. The car was overheating slightly on the drive home, even though a 50 F day. That fan just barely fits between the grill struts. I plan to also put one in my 1965 Dart. I have the same fan on my 1985 M-B, but it also has a mechanical clutch fan. I think the electric fan is intended to help the AC condenser and only turns on due to refrigerant temperature at the filter/drier, so might not suffice to cool your slant. If you get one, also grab the vertical mounting bars and cut the wires long after the connector. In general, electric fans move less air than a mechanical one. An exception might be the Taurus 2-speed fan, which hot-rodders like. You also need a 40 A relay to drive the fan, or perhaps a solid-state relay like my 1996 Plymouth minivan uses (~$25, riveted to front bumper for cooling). There is no room to fit a clutch fan in an early-A slant, even the thinnest one (Jaguar). They recessed the water pump into the side of the block to barely fit the engine in (as did GM straight 6, I think).