The alternator in my car ('87 GL 2dr 4wd) doesn't seem to excite until around 4k RPM, which doesn't seem quite right.  It uses the factory 3-wire setup and hasn't been modified, as far as I can tell.  Found the receipt and it is a Schucks reman unit.  I am completely green to these cars, is this correct? 
  
I have searched through a number of different threads here and didn't find anything relating to the core problem, though the GM alternator swap does interest me.  Has anyone used a Ford 3G alt in a Subaru?  If so, was it worth the effort or just a pain in the butt?