Has anyone used a Chevy "car" radio to install in their truck? I have a 64 push button radio out of an Impala that seems like it would fit in the hole of my 64 truck okay, but the tunner knob threaded shaft is shorter than the on / off volumn shaft, and wouldn't protrude thru the dash.... hence, I wouldn't be able to get a nut on it. I can't remember if the Impala dash was recesses so the radio shaft protruded, or what the case was. Anyone have a "work-around" this problem? It's a "weird" thread on the radio shafts.... maybe 7/6" x 27 tpi, so making a "special" nut wouldn't be easy. Thanks for any ideas!