if you're attempting to please show judges, any signal setup will be a non-factory addition .... Guide was a 3rd party supplier that produced signal assemblies, Signal-Stat was probably as common, and they were all basically the same, none would be "correct" as none were from GM directly .... the reason the one you picture indicates for 41 Chev is because the self canceling wheel fits the Chev steering wheel/column configuration, mostly a marketing thing, it could have fit other years and makes just as well, and it may have been a "re-branded" Guide or Signal-Stat unit
Bill
