I have a spare 480033 400 non-AC Power-flex fan. It looks odd, but it's perfectly normal. The offset arms lower the noise level. The blades are riveted, with stiffeners, to the arms of the hub. The blades themselves are quite flexible.


I need to clean up the spacer to see if it is correct. You need a 2.5" spacer and 3 1/2" fan bolts to match, mine is about 2 9/32". This particular fan was mounted on a later model engine.