You can purchase timing chain sets that will compensate for the crank shaft being moved up in the block due to line boreing/honeing. You will need to measure the change in the center line distance of the crank shaft as it relates to the center line of the cam shaft; stock distance is: 6.12 inches.
This^ Call the guys at Cloyes. They'll get ya set up properly. I would never run a tensionor in an LA engine. No particular reason other than Ma Mopar never put one in there. Not to mention that 1 added part equals one added potential failure.
