Some so-called Contour fans are not OEM quality.
These are.
https://lmr.com/item/LRS-8607F/mustang-contour-electric-fan-assembly-79-93
The price has risen a lot due to the current hot summer & they sell out quickly.
The length is an exact fit to the Fox Body radiator. Must cut off 2 tabs, keep the top one, it's hanger.
I had a Mark VIII fan in here previously. Had about 1/4" clearance until new radiator, water pump, timing cover. Then 0" clearance.
Supercharger crank pulley is oversize & auto tensioner protrudes further.
Nothing cools like the Mark VIII, if it fits your configuration & you can find one.
Fan had to be removed to get belts off. I sold the Mark VIII to someone with a similar setup as yours. His non-OEM type Contour fan wouldn't cool properly.