Yep. The late 70s and early 80s mark the beginning of several strategies, policies, and chess moves that paid off
big time in the 90s.
The neoliberal movement gained a major presence in the Republican Party at the beginning of that span, and by the early 90s it had also captured the Democrats.
The Fairness Doctrine fell, and its absence was quickly exploited. The ball took a while to get rolling, but was moving fast by the early 90s.
Economic libertarianism saw some important activity near the beginning of that span, and its very confident anti-government and laissez-faire positions and language became very influential through the 90s, and it continues to grow.
The fusion of the GOP and evangelical Christianity became (very deliberately) much more solid in the late 70s and the 80s.
Basically the Republicans began in a bunch of ways to shift toward their 2rd major re-organization and re-orientation since WWII in a short span of years around 1980, with the 90s being when they'd pretty much finished that shift. They may be working on a 3rd one now, which we may end up backdating to the Tea Party movement (that time being this incarnation's "~1980" turning point). We'll see, depends how the next 5-10 years goes, may amount to nothing.
As a side-effect (or bonus, to those behind it) the Democrats ended up having their 2nd major change in the same period, too (to solidly pro-neoliberal). AFAI can tell they're not starting their next serious shift, yet.