Can I run two OS and be able to switch back and forth on my custom PC? Could I run Mavericks and Windows 8.1?
What you're asking is possible but not as simple as maybe running windows and linux or dual booting windows 7 and windows 8...
Check out: http://www.insanelymac.com/forum/
Lots of good info, tutorials, etc there.
If asking for typical dual boot system, no.
this is a wrong answer. i built a dual boot system 5mo ago with osx and windows 8. runs perfect! just need to do some research on which mono, cpu, and video cards u can use with osx.