1. Will I need a new timing set from Comp so I can degree the cam?
NO. Unless the chain is extremely sloppy, then get a new timing chain and gear.

2. Is it even necassary to degree the cam? Will stock timing gears/chain work?
Before you take the cam out, you have to align the cam gear with the crank gear do that it is at TDC. The ls1howto.com article shows how to do this.

3. Will comp 918's work with stock retainers? If not is there any significant difference between Comps steel retainers vs there titanium besides weight?
Yes, the 918's will work with stock retainers just fine.

4. Oil pump- Should I replace? Still has 45psi at idle warm and over 60psi while driving.
Nope. Everything looks fine psi-wise.

5. Lifters? Stock ones ok or should I go LS7?
Lifters are fine.

6. Other than pushrods anything else I should address while Im in there?
Read the ls1howto.com article. If you have any other questions, feel free to PM one of us.