"Ran when pulled"

To the OP. If you ever take the timing cover off post a pic of the cam and thrust plate. I'm curious if the cam has a snout for a mechanical pump or not. I know the magnums don't.
my '89 not only had the snout, but it had the eccentric for the mechanical fuel pump. All I would have had to do is remove the plate they had blocking the mount for the mechanical fuel pump and I could have threw a carb intake on it with a mechanical fuel pump. Mine also came with a double roller chain.