That motor and drive are 50 years old
If the heat exchanger maintenance has been kept up, then it may last another 50.
However that chunk of iron is heavy
A 4.3/A1G2 combo can be dropped in saving 200# and adding 50-60hp
I bought GM key blanks and GM fobs from a GM parts site and used the local dealer to cut 2 keys and pair the fobs. Doing some legwork saved me a few hundred
the original mechanical fuel pump lasted 52 years. an electric pump will last 5-7 years. I would bolt on another mechanical pump and it would outlast the boat
