I have a 360 sb in my ‘70 Belvedere that once again has working AC. Was having some minor overheating during Power Tour in the long lines (with AC off). I have a stiff aftermarket fan with non AC style cheap ($35) fan clutch. Is the $230 cost of an “AC” fan clutch (year one) justifiable and will it help or should I just go with a flex fan? I really don’t want to go electric fan. Second issue I have is the fan blade is not centered in the shroud (sideways or up and down). Shouldn’t it be? My hunch is the shroud may be from another car. I do have the 26” radiator. Should this car have an 18” or 19” fan? Thanks for any input.