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I don't know if this helps or not, but ....
Here's a shot of a 1968 Hurst Olds IBM punch card. I *think* the code is C48 for the Export heater delete.
Your right Casey, the option was C48 Less Heater Equipment-Contents. I have never seen this option listed on a build sheet but its in the 1969 Camaro Factory Assembly Instruction Manual... Hopefully this helps, Mark