Should I replace head studs?

[ahklein]

I am rebuilding my 73.5 911T engine to stock specs. Should I replace the well fixed, original head studs in my magnesium case? The engine has not been rebuilt before, and the nuts all came off without trouble, leaving well-fixed studs in my case. I will not modify or race this engine. Obviously, removing them poses the risk of breaking them, and having to send my case out for repair. Any thoughts?

[Flat6pac]

The studs were never a problem in a 73.5 T case.
2.7 was the problem.
Bruce