Flex-aLite fan for Slant 6?

The 7 blade ones for Volares with AC move a lot of air and are pretty thin. I tried Flex fans for my slant but they're too deep and hit the engine if you don't have at least the stock spacer in there.
is it this one?
Fan Blade 8-318 7 Blade 18" Diameter Fits 68-74 76-78 CHARGER 361446 | eBay
or this one?
Mopar 7 Blade 17 inch Solid Fan Dodge Dart Plymouth Duster Valiant | eBay