There are two pumps that work. The OEM style pump is good enough for most stock applications, but the one's you get at the store are rebuilds, and can be weaker and more prone to leaks. I have used one for a while.
You can also do the upgrade to the Saginaw pump, it is from later years on Fords. It is a nice and simple upgrade. The vendors have them (probably what you saw at Tom's), and the look like a canned ham shape with a larger port on the top for fluid.
To use these with your stock box and hoses, you need to buy a small adapter that allows you to thread you OEM pressure hose onto the back of the newer style pump. Again, these are available from the parts places. I am not sure about the bracket, but I think they're interchangeable with the stock pump. I know they are similar, but I don't recall how I mounted my upgraded pump.
Depending on your pulley size, you may have to source a new belt, that is always a fun time. LOL! Good luck, but I can tell you unequivocally that the newer pump is a great upgrade that is well worth the effort.
Yes, the 74 Had PS.
Rich
