Knobs,nuts and dials removed,unscrew the two screws in the front.Unbolt the bracket on the side of the radio,right side if i recall correctly.Unplug the antenna and rear harness from the radio.Should drop out but cannot remember if you need to drop the ashtray and bracket out of the way to get it out.Not sure about an A/C car and the front speaker due to the ducting.I would imagine remove the duct work and then unbolt the speaker bracket to get it out.
David
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*