There were just 3 different super 6 manifolds that sold for right around $300 on eBay.
SUPER SIX 2 BARREL INTAKE MANIFOLD 4041043 Mopar Chrysler Dodge SLANT 6 225 2bbl | eBay
SUPER SIX 2 BARREL INTAKE MANIFOLD 4041043 Mopar Chrysler Dodge SLANT 6 225 2bbl | eBay
Slant 6 Super Six 2 Barrel...