No, Monaco wasn't shown live in the US until sometime in the 1990s. I believe ABC showed the Monaco GP starting in at least the early '60s, but it was probably chopped up for broadcast on "Wide World of Sports" among something like boxing or gymnastics or log rolling or lord knows what else.
I think Wide World of Sports actually did carry it live that year. I was pretty small but seem to remember it, and later when I was in my teens recall my dad mentioning how disturbing it was to see the smoke rising above the circuit on the WWoS broadcast. Maybe same day delay, with different editing standards than would be in use today? I think this came up around the time of the Ricardo Palletti accident in Montreal in '82.
I also clearly recall watching the '69 race on Wide World. I would have been 5, and honestly Rindt's charge defined one of those beauties of the sport, the "pursuit over time". It remains one of the great elements of road racing in particular, even as recently as MV's win last weekend. I spent the rest of the afternoon on my Schwinn Stingray racing around the neighborhood imagining it was a track.
Wide World of Sports (the thrill of victory, the agony of defeat) seemed to reliably carry Monaco, an was probably a gateway drug for many a youngster in the USA at the time. By the late 70's the Long Beach GP was also a "TV event". And by the mid-80's it seems like most F1 races were available. Thanks Bernie...
But I digress, this was about sprint car racing...