[Lothar]

78 to 83 U.S. SC's were lumped together according to the PCA competition rules. I believe that the same rules apply to all model years in that description. So, even if all SC's in 1980 came with a/c, I believe you can remove the components just as their 78/79 competitors can. Because the weight to hp ratios were the same accross the U.S. range, there was no reason to separate 78-79 from 80-83.

That said, get a ruling from a PCA scrutineer and you can hope and pray that it will hold up from one official to another. The rules are not consistently applied throughout PCA with respect to other finer points of car preparation, but I would hope that this issue would be fairly cut and dry.