Early 65 factory literature doesn't even list 14 inch wheels as an option. It does list a handling package with HD springs and torsion bars plus a front sway bar, with no mention of 14 inch wheels.
Rallye suspension:
Standard tires were 6.50 x 13 blackwall for six cylinders, 7.00 x 13 blackwall for V8's:
Optional were 6.50 x 13 whitewall and 7.00 x 13 blackwall for six cylinders, and 7.00 x 13 whitewall for V8's and sixes:
Accessory groups included a "Performance Group" that included the Commando 273, rally suspension and power brakes (with no mention of tire size) and a "Sport Group" that included 13 inch whitewalls. My Barracuda (which I've owned since 1968) has both these groups and also the "Basic Group."
One would think that if 14 inch wheels came with the handling package, the literature would have said so.
Note that HD shocks were not included in the non-S handling package. They were a separate option. The S included both, as well as fourteen inch wheels (plus a tach, which my non-S Commando 273 did not have).
My sway bar could not have been added after the fact without also swapping the original lower control arms for a set with the factory mounting tabs. I have owned mine since August of 1968, when it only had 30,000 miles on it. I am quite convinced that did not happen, and that my car originally had HD suspension with sway bar and 13 inch wheels.
