64 F100 Heater Modification/ Update?

[CSmalley]

I have been searching for heater assembly parts for my 64 for a while now with no luck other than a heater box, motor and core. I can not find the plenum/ vent and the parts that connect the box to the kick panel vent. It seems to be a lot easier to find the entire assembly for the 65 F100's. Has anybody installed a 65 heater assembly in a 64 with any luck? Thanks.