BINGO...
did a quick run to the store to get an old chevy points condensor and, and an inline radio suppressor. NG/NG
did an e-mail to Aircraft Spruce for 2 specific in-line noise supressor that Warren suggested.. they have many suppressors but wrote back NG
tried resistor spark plugs, worked a little bit, 1/2 NG
tried bells suggestion on grounding audio feed wire sheath, worked a little bit, 1/2 NG
from frustrated energy I start reading the MSD big full line catalog and big "Wiring Diagrams & Tech Notes"[$5]
bingo.. no more radio speaker noise w/MSD noise suppressor used alone.. I'm in the middle of wrench work and this job had to be cleared up to clear me up........Ron