Engine Driven Fan?

no AC, 17" IIRC, 7 blades, fixed no thermal clutch

remember that cooling is more than number of blades and diameter. Pitch is huge!

also the pulley diameters, the radiator, etc.

Found an old photo. Looks like the leading edge of the fan is closer to 1.5 inches to the rad.

View attachment 1715828332

Yes, I agree on what you are saying.