I finally got to clean it up a little and it has definitely been piped and it looks like the #1 oil passage has been tapped just like the article that John posted. I ordered the DC book so I can verify everything is done correctly. So now the next question… undo it or stay the course and finish the job?

1968 Coronet
1968 Charger
1966 A100 Pickup
1967 Barracuda
1970 Challenger
1972 Challenger
1973 Barracuda
2021 Ram 2500