Call 10 local *electrical contractors ....and ask them to
recommend a general.. then do the same with a dozen
*plumbing contractors, ask them to recommend a general
contractor... one or two names will float to the surface...
those will be the best in the area for sure.

This way you will either get list THE MOST expansive GC
(cause they pay the most to subs), or GCs relatives of subs.

1) Ask people who done those projects for references
2) Call county inspectors ( they not always allowed to give
references, so just be smart: ask questions about your
project, inspections and they will give away good GCs / subs
3) Ask phonebook GCs for references, and do call those people.
Mention the names of GCs/subs you selected to the county
inspector(s), see they reaction.
4) Know what you want.
5) Do you really need GCs?????