Mayby because the 39 standard was the only fan mount generator that did not require a piggyback cutout,it had the firewall mount cutout/regulator. My guess.I have also heard that a 39 STD is the one to get ?? What's the big advantage of a 39 STD gen over a 36 to 38 ? or even earlier ??
I was told that I needed a 1939 Std. or Pickup generator that has the 4 holes in the pully to mount the fan to. I'm using a 59 AB motor in a 32 Ford. Can you help with parts. I think the pullly screws on? Thanks
I have these 2 pulleys that are both Ford originals of the same part number, they are identical pulleys except one screws on and one is keyed on. So apparently they came both ways.No, the 39 Std generator pulley slips on with a key way abd us held on with a nut. 81A part number I am pretty sure. Someone needs to repop that pulley.