just letting everyone know the the pump off a 64 mustang is a direct replacement for the 64 valiant. I know how people look at you funny when ask for that stuff on an older mopar. I even called this wildcat caompany and they told me to go to layson's. no thank you. luckily we have a mustang specialty shop in town. so went in there looked around and found it. the bag will also fit but its not the same and you have to get some vinyl paint and spray over the FoMoCo on the back.

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64' Valiant Signet 5.9, 64' Dart 170 moredoor 3.7, 67' A100 3.7, 00' Dakota SLT 4.7

This is one of those universal items that all makes seemed to have in the early to mid 60's. Do a search for any aftermarket Ford parts houses and you'll find them for about $40. I know my Dad's old 64 Galaxie had the same. I've seen T-birds and Mustangs with them to, seems from about 62?-67 used the same on all Fords.
My 66-300 has the same too, saw on the Bag a week or so ago that some numb-nut was starting the bidding on one for $200. I want what he's smoking!