Marlin -
My recommendation would be to build a short adapter cable from the 8-pin microphone you desire to use and the 4-pin connector on your radio. These connectors are readily available at your local amatuer radio dealer or through Tower Electronics (Green Bay, WI)
You must also make user that the microphone and radio impedances (Low-Z or High-Z) match
IF you are dealing with Kenwood radios, then the pin assignments for the connectors are available on their web site:
http://www.kenwood.net/indexKenwood.cfm?do=SupportFileCategory&FileCatID=673, Greg
w9gb