Any clutch fan options for 73 dart, /6?

I tried a M-B fan clutch on my 64 slant. It looks similar to the Toyota one linked in post 5, but even thinner. Even it didn't fit. I recall I have just 2" from the end of the water pump to the rad core, but the rad on the car isn't factory (don't know where from). I used a nylon flex fan (Summit) on a short spacer (1"?, forget). The M-B fan does bolt-up to the w.p. w/ no bushings or such. You must use an open-end wrench on the bolts since no room to slide a box wrench over the bolt head. Your 1973 engine bay likely has more room than my car.

I just measured one I have on the bench from my 1985 M-B 300D. It is 2-3/8" from base to front face. This is the factory type w/ flat thermo-spring. The ones w/ coiled thermo-spring (like Mopar) are ~1/4" thicker. People say a Jaguar clutch-fan is similarly thin, and might look the same.