[Oldsguy]

Jim, I am figuring the previous owner purposely disconnected those extra lines when installing the rebuilt engine. With an Edelbrock carb instead of the original there would be no place to connect some of the wires and perhaps some of the vacuum lines. And since the car runs well but the service engine light is on I would guess that it is in fact because of the engine swap. You probably won't be able to re-configure everything back to original unless you went back to the original engine. Possibly there are also sensors on the exhaust and block that are disconnected too. Man, if it runs good just run it and ignore the light.