will a 1967 heater blower resitor work in a 68?

They don't sell the 68 resistor and they say it won't work. I got a car with no heater parts at all and I have ordered a new plenumchamber, heater box/seal assembly, blower motor and a resistor for 65-66-67. Now I can't find a squirrel cage fan. any ideas?
 
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