1965 vs 1973 7.25” small bolt pattern axle

I can't swear to it, but see how many bolt holes are in the axle retaining flange. If they both have 4 bolts they should interchange. If they both have 5 bolts they should interchange. If one has 4 bolts, and one has 5 bolts, no interchange.
I know for a fact the 65 is a 4 bolt. Will have to pull a drum off the 73 and count bolts.
Thanks