There might be another option, the plug that screws into the pump housing Is removable.
Can I just replace this receptacle with an older version that matches the hose end?
When I say plug, there's a sleeve that screws in to the Saginaw housing, then the hose screws into that.
I guess I have a 76 up version that takes a lip with o-ring.
If I could find a 70 version that accepts the inverted flare style?
Yes, but pay attention to the size of the internal hole. It determines the flow rate of the pump. Too low of a flow rate for that ps box and it'll let you know.
