Not pumping??

I would put a double roller timing chain when a apart as acdragon mentioned.. Also I would put a 8 finned impeller water pump they cool better.. You are very lucky that you were not running an electric fuel pump... If that cam gear came off while driving down the highway you would have had some serious engine damage... A real good thing you found it...But it makes me question the rest of the car and engine... How good was the guy you bought it from as a mechanic...Bill