Being an engineer, I would be a tad worried about the forces on the bolts, which would be extra long to deal with a spacer. On a normal fan, there are no torque differences between the fan and the pulley (through the spacers) thus no differential sheer forces on the bolts. However, a fan clutch has the fan rotating at different speeds than the fan pully, thus places sheer loads on the bolts and now those bolts are longer. The different rotational speed of the fan/clutch will try and twist the assembly in relationship to the spacer and twist the spacer in relationship to the fan pulley...
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
