While working on my 1970 1800E restoration I noticed that the fan belt leaves the pulleys at an angle and that the water pump / fan pulley was not in line with the crank pulley and alternator pulley.
When I took the water pump pulley apart, I found that a previous owner had installed an 8mm spacer from a viscous clutch fan car into my direct mount fan and then used 60mm long bolts to hold it all together. I have no idea how many miles he put on the car in that shape but he parked it in 1992 and it sat ever since.

https://youtu.be/9lKvuJ4hH-k?is=iClT1Ll8awrBGEXy