Hello, I am going to go ahead and change my timing chain set and gears, and also put on a new oil pump on my 03 6.0 with 31k miles, the only mod's are TSP 224R with their double spring's and hardened pushrod's. I have searched but everybody say's different thing's. On the oil pump I talking about Katech, Melling, TSP ported etc., and on the chain I know I have a heard a lot of bad thing's about rollmaster, so I won't be using their chain. Thanks for any info!