Upping power

[JMBT]

So I have a CM2250, factory 500hp ST. I know I will be needing an inframe relatively soon and as my average loads have gotten much heavier then they were when I had the truck built in 2011, I am interested in changing the internals to accommodate a higher HP tune. Maybe 550-600 nothing crazy.
When the time comes I will most likely be doing the inframe myself so I am trying to gather as much info as possible before then.

So my questions:
How do I find out if my block, etc. would be compatible with the higher HP?

Where would I go about finding a CPL of which parts would need to be changed?

How would I locate part #’s for an upgrade, as my QS account and engine VIN won’t be of any help.

Thanks in advance for all your ideas and suggestions