I have an 89 Sierra with the equalizer and cassette. The current radio works occasionally, wont work occasionally and often creates the sound I would liken to the phony sound of a gun silencer on TV. I want to eliminate the EQ and cassette, I am hoping to find the cubby to replace them. I have access to junkyard trucks, do I need to find a radio and booster from a non EQ/cassette truck? I am hoping to find a booster (by the gas pedal) in the junkyard, keep my head and just remove the EQ/cassette from mine and use the replacement booster to get my radio working. An online refurb place lists the head and booster as different depending on whether or not there is an EQ.