Magnum reseal questions?..

if you have not already purchased a timing chain setup, get the kit with the spring tensioner. it can come in single roller or double roller. then you will never have chain stretch.
Let's fix that.

You will still have chain stretch but the tensioner will take it up, doing away with the chain slop.

Exactly. I replaced my timing chain and tensioner with a mad worn out chain so bad it retarded the timing. Great set up though. A shame it was only 175K on the 3.9 V6 (2003 Dakota 4X4)