First off.......I can't go back to 1980....so these are all for an 82. Sorry.
Second, I hate to say this, but good luck. You need to figure out which is the correct diagram.
Which one of these is your car? (Don't ask me what it means, lol, I have no clue where to find this info.) If you have a manual trans this will be easy, lol.
• Fig. 73 Calib. Code 2-20R-R02 Exc. High Alt.
• Fig. 74 Calib. Code 2-20R-R15 Exc. High Alt.
• Fig. 75 Calib. Code 2-20Y-R0 High Alt.
• With Thermactor
• Fig. 73 Calib. Code 2-20R-R02 Exc. High Alt.
• Fig. 74 Calib. Code 2-20R-R15 Exc. High Alt.
• Fig. 75 Calib. Code 2-20Y-R0 High Alt.
• With Thermactor
Automatic
• Calib. Code 1-20B-R1
• Calib. Code 1-20D-R1
• Calib. Code 2-20J-R11
Manual
OH SWEET.......look what I found! Hopefully you still have your sticker!
The engine calibration code is located on an engine code information label, Fig. 1, which is located on the front of the engine.
Here is an Emission Application Guide.....