63-65 6 cylinder 4 speed bellhousing

I have done some research and the bell I have that is in question is a 64 A body aut there is also another one listed as a 64 A body which is probably the one I compared it to when I put the 4 speed set up in mt 65 Valiant station wagon a couple years ago. I'm wondering if anyone here knows if these two are interchangeable
2463025 G/RG A-833 1964 A-body Cast Iron
2463027 G/RG A-833 21x63 1964 A-body Cast Iron
If they are then I don't need a bell at all !