73 charger 318/904 cooling system

[texas charger 73]

I'm trying to get a fan and shroud for my 73 charger,but I'm not sure of the correct size.  I have a 318/904 combo. It has a 26" radiator bit there is no fender tag code for max cooling. Everything I'm finding shows all cars that were not max cooling has a 22 1/4 in radiator.  I'm stuck.  The shroud I think fits my radiator has a 20.25 in fan opening.  So should I go with a 18 1/2 inch fan or a 20 inch fan? I'm also in Texas.   Car has ac as well but not hooked up.  Had flex fan when bought and Dont want to go back with that

[texas charger 73]

Where could I find more info?

[ODZKing]

2998326 is the 26" part number.
A fellow at FBBO has one for sale http://www.forbbodiesonly.com/moparforum/showthread.php?71962-Rad-Shroud-2998326-26-quot-original-not-repro
or http://www.ebay.com/itm/NEW-Mopar-67-69-B-Body-Radiator-Fan-Shroud-GTX-R-T-Charger-Satellite-Coronet-OEM-/321631742689
looks like it is still available as a performance part from Chrysler
http://www.ebay.com/itm/Mopar-Performance-P2998326-Fan-Shroud-/111487688041

[texas charger 73]

Thanks