Head questions on turbo car.
 

I have had the heads on for about 12k miles.. LS3 GMPP CNC with stock valves and BTR spring pkg and TIT retainers.

Are they ok to reuse?
Do I need to upgrade the Valves?

If yes.. Can I just put new seals and lap new valves in?

If there is work I can't do myself any shops I can send to that will knock them out fast so I'm not waiting?

Goals are 800 to tires.. Maybe 1000 later

If everything was running fine when you took them off they should be good to go to reinstall them.

At a 1000 wheel-you may want to look into a LSA head instead-but at 800 they'll work fine.

Bone stock heads would do 800rwhp just fine. Yours will just make it easier. No need to mess with anything.