You should hear those Optimods in stereo, very rich and full bodied sound. Oldies works exceptionally well in AM stereo but the example I am thinking of is past. Olympia used to have KGHO 920 as an oldies station running stereo and they were so proud of it that status was announced in the top of the hour ID. Processor used there was an Orban Optimod 9100A and I am sure KVI already has this type of equipment set up. The wide channel separation typical on 1960s stereo mixes will certainly utilize the modulation advantage that C-QUAM has over FM stereo.