Kevin,
 
The 8Xnnn builds describe PPC Mac OS X releases, and the 8Xnnnn builds
describe i386 Mac OS X releases.  Both are built universal; the PPC
Mac OS X releases strip the i386 architecture, but the i386 Mac OS X
release still include the ppc architecture (for Rosetta).

- Kevin
this is good to know, however, in the past I have found that not all builds will build on all architectures.  For example: I can build gcc_os from build 8G1165 on intel, but gcc_os from Build8G32 will not build.  I get a chroot error.  These two builds are both a direct decendent of build 8F46

I guess what I said previously was not really what I meant.  Maybe issue I am having is whether or not a build is buildable on an architecture rather than can be built for a specific architecture.

Michael