Swap early 225 to a later 225

Hey everyone, I’ve searched and searched but cannot find an answer. I just inherited a 1963 Valiant Signet convertible. I’m new to classic mopar. It has the original 225 with push button auto trans. The motor was froze. It came with another 225 from the mid 70’s. Can I swap in the newer 225? I want to get this thing back on the road asap. Thanks.