While perusing the interweb I came up with this interesting factoid about early Ford Mustangs that went to Hawaii (and Puerto Rico):
In 1965 all Mustangs to Hawaii and Puerto Rico came with heater delete systems and were given a $50 credit off MSRP. Those that wanted heater cars (standard production) had to order it. Heaters were not deleted in 1966 as they found that surfers liked warm air on their feet after dawn patrol in the water.
I have gotten numerous requests over the years for heater delete parts, especially for the firewall pieces. Don't bother asking anymore, as the salvage yards have long been raided for the special parts from the fan box, firewall pieces and fan control delete (original metal not plastic repo).