The guy I talked to was concerned that they get old and brittle (gear perhaps). He was saying something about plastic. Anyhow, the car has original chain and 29k original miles. I am planning on just replacing waterpump. Thanks for the input.
Didn't realize 29k original miles. In that case I would replace it with a Mellings timing chain sprocket set. Seen many of the nylon gears give out back it the 70's without much advance warning. My 67 400 4spd stripped the teeth around 40K in 1981-82.
