Jo-Han wasn't putting a lot of effort into their annual kits by that point; all of them had one-piece interior buckets (seats molded in) and not many optional parts. For what they spent to tool the oval track parts, they could have tooled a one-piece chassis and stock engine for the Torino.
To top it off, that was the last of the racing-only kits they did. Jo-Han went all-in on racing from '70 through '72, but unfortunately chose a lot of one-off items. The Challenger funny car had pretty much a one-off chassis, as did the Mickey Thompson "titanium" funnies. Of the race cars, the Maverick/Comet and 'Cuda were the most durable sales-wise. The Trans-Am Javelins raced into the late Seventies, with "Jocko" Giacomo (sp?) running one of the ex-Penske cars, but Jo-Han had to update the body (or did they; was there actually a '73-'74 promo?)
The two mysteries of the late "pre-Oldies" Jo-Han period would have to be: why no showroom version Torino annual kit, also why no showroom AMC Hornet kit (especially when nobody ever ran one as a funny car--though the hatchback would have looked good...)
--Mark