1965 small block A904 leak

In the interest of fixing everything else I noticed that there are two trans filters with different part numbers for 1965. There's one for V8 and one for slant 6, but that doesn't make a lot of sense to me. I had a slant 6 one laying around, but ended up ordering a V8 one just in case. Once I get it I will compare them. Anyone know the difference?