Second that on the fan shroud. One thing I did notice when I went to electric fans-or rather, my wife noticed it-was that the whole rig was so much quieter on the highway. That big ole' flex fan eats 20hp while shrieking and shaking like a banshee at speed. The whir of electrics is almost inaudible on the road, and the engine still stays cool if the setup is properly sized to the vehicle's cooling needs.

Low compression and low speeds back then meant that the four blade water pump mounted fan was adequate, mostly. Nowadays with (sometimes) more compression and always much faster traffic means that it's OK to look at modern solutions to modern problems of keeping it cool.


1965 C60 school bus | 1967 GMC 6500 school bus