Probably right on the money. Whilst browsing through the mags, I noticed that they not only were announcing the new full-size for '78 Bronco as early as Sept. '76, but they already had a hands-on test going on! Didn't read it, but saw mention of it somewhere in the mag.
Talk about pre-selling the thing. But, at least those paid to predict the outcome got their bonuses that year, because the '78 outsold the '77 by a 10-to-1 margin, if I remember.
Maybe not exact, but it was a walloping big change in sales.
Personally, I always thought they should sell both. I was never against a full-size to compete with the well-selling Blazer at the time, but felt they should give them both a chance.
Oh well...
Paul