Cummins X15 CM 2450 Overhead

Hello, wanting to do an overhead. Can't seem to find any info on over head. Have searched all over for a few days for service manuals, but can't find much. Before I start buging the local Cummins guys at work, I wanted to see what you guys have to say. This is my first Cummins of this breed. Currently I have 250k on this engine. I know they say overheads can be done at 500k, but I call ########. I'm really anal about my maintenance. I like to get everything done early and do it myself so I know it's done right. I know I should have probably done it earlier, but here I am. Anyways, I haven't had a chance to look at my engine, but I'm assuming it's similar to the older ISX. From what I understand on the older ones, the sequence is lining up A B and C on the balancer to your line on the front to adjust. Odds on one rotation ABC and evens on the next rotation of ABC in the firing order.
A 1&6
B 5&2
C 6&4
So say if you're on the A position, and want to adjust cylinder 1, you check to make sure both rockers are loose. If not, do a full 360° back to the A position and you should be good to go.

So I understand that part, now I need to know how to adjust the injector. From what I gathered on that one, is you break the lock nut, back it off a couple of turns then tighten it to 71in lbs. Then mark it, back it off and bring it back to 71 a few times to make sure it comes back to the same spot. Not really sure on this one.

The last part would be the intake, exhaust and engine brake. I just don't know what the clearance is for those. But I do know they are just like all other rockers. And of course mark everything after it's done

Now this is from what I understand on the older ISX. I'm not sure if this is the same way you do it on the new CM 2450. That is what I need somebody to clear up for me. If someone could give me a complete rundown and the numbers that I need it would be greatly appreciated. Hopefully this new thread helps others as well. Looking forward to doing a little learning.