[tkeduk8r]

IF you want a neat cheap upgrade that will flow alot more air, you can take a blower out of an 73-87 pickup with air conditioning (flange bolt pattern is identical to 63-66 trucks). Now the squirrel cage of the air con plastic squirrel cage will be about 3/4 of an inch taller than the metal cages in the 60-66 trucks, BUT if your careful you can trim the top of the plastic cage down to the metal cage INSTALLED height, reinstall on the newer blower motor and reinstall in your heater box. It moves ALOT more air than the standard blower motor and will heat your cab in no time... I have done this a few times since I live up here in the frozen tundra and it woked everytime... You could install a slightly higher amp fuse too, but I have found that the stock fuse is sufficient.....