Funny you should mention metal cased Moto speakers, I'm using one on my BC796D and it sounds better than the new plastic Slim Line (tm) speakers. Well, maybe that's because the enclosure is a bit larger and my lining it with 1/4" thick fiberglass (the rear vents are also covered) eliminated the slight metallic ringing sound.
"even had the '60's era base mic like the one used in "The Andy Griffith Show""
Hmmm, don't remember that but the prop man for the show didn't know his arse from a hole in the ground. The "base station" consisted of an Eico 720 75W CW ham transmitter with a Heathkit "lunchbox" Twoer sitting on top of it. You never saw Andy talking on the mobile rig and never saw inside the patrol car, he made all his calls by telephone! "Hello, Sara?" (;->)