I know it's an obvious question, but did you take the fuel pump out of the stock tank, along with the Chrysler inline fuel filter?
5* is correct, I found my old thread:
http://www.peachparts.com/shopforum/diesel-discussion/312030-chain-stretch-key-do-i-need.html
I put my new timing chain in a coffee can with oil, set it on the bench, and it disappeared.