Sid,
70-72's would not have kick panel speakers. The one exception to this would be if the car dealer was requested to install the old style under dash 8-track player.
From '70-72, if you ordered stereo equipment, you rec'd (2) 6X9 speakers in the rear deck--look under there, there's cut-outs, and (2) 4X6 speakers in the dash.
If you ordered a NON stereo radio, but ordered A/C, you rec'd 2 speakers up front, as the standard single speaker up-front would not work because of the center A/C vent taking up too much room. You could have also ordered a single rear speaker to go with your non stereo radio. I can't remember if it was mounted on the passenger or the driver's side 6X9 cut-out.
If you ordered a non-stereo radio, and did NOT order A/C you would have rec'd a dash pad with a single center speaker.
Bottom line, speakers went inside the dash and rear deck from '70-72 from the factory.
Non-stereo means AM, and FM-mono equipment
Stereo means, AM/FM-stereo, AM/8-Track, and AM/FM/8-Track equipment.
Hope that helps.
Joe
