Ok I just checked the fan in the Crawler Truck and it is definitely not as good as mine, however, it routes air through both side vents whereas my fan only routes air through the center vents. So there is less restriction/passages for my system to blast some air at ya.

One thing I remember when we took apart Bevin's dash during his 3RZ-FE swap was that he had male air ducts entering into female couplers that had a sort of felt material to maintain an air-tight fit. Well most of his felt material had flaked off and was missing, and with his fan turned on, you'd get a ton of air coming out of the joints of his air ducts. That is all wasted pressure that would otherwise be enjoyed by the cold occupants.

Regards,
BigMike