Thats correct, the 4 prong is NOT AVAILABLE from the restoration houses.
This is a simple resistor though, so in theory you could take 2 (3 prong AC resistors) from the 68 model year, break them apart, use some circuit board material to layout the 4 prongs, takes one of the resistor wires and shorten it a bit to give yourself a 3rd resistance, and put it together into a package that would go into that suitcase cleanly..
I myself used an American Graphiti AC delete suitecase, and a 3 prong resistor pack, cut the wires to the old 4 wrong and soldered/crimped 3 new spade female connectors, then just plugged them right into the 3 connections. Sure I have 3 speeds (medium/high/full) without a LOW but thats ok for the time being until I go Vintage Air or similiar.
[ 01-14-2004, 11:43 AM: Message edited by: Brian Lewis ]