new to grizzly central

Thank you for excepting me into grizzly central! I’m from Syracuse ny and recently bought a 2000 grizzly 600 with 900 miles on the clock. The bike had been sitting under a cover outside for a couple years so I need to go through the bike and make sure I can get her to be reliable. First off I know it will need a new battery(that’s a giving ). Second a found that the header pipe had rusted through and had a hole so I started to remove the old one and snapped of 2 of the studs holding the pipe to the head…I removed the head and tried to use a easy out and snapped that off as well so then I had had to drill out the bolt and easy out and retap the threads… now I have studs back and will reinstall the head once the gasket kit comes in the mail.. I’m hoping I can find a header and get the battery installed and fire her up. Maybe go through the Carb if need be. We will see. From What I can tell I’m going to like this atv and end up Modding it to my liking. Once again thank you for excepting me and I look forward to the help and good guidance along the way.