I think the major foreign policy change is that detente lasts for longer. Carter was eager to pursue less tense relations with the USSR on the advice of Cyrus Vance, but on the advice of Brzezinski slowly started to emphasize human rights more and more. I see Ford recognizing Pol Pot’s government and continuing conciliatory policies with China, but also supporting the Pinochet government. I see him being more hawkish in Iran; he either prevents the Iran hostage crisis, or is much more willing to use military force. In Afghanistan, I don’t see the crisis escalating the way it did; if it does, I am almost certain Operation Cyclone takes place (Kissinger’s views on ISIS are quite positive; I am not sure why anything should change).
Domestically, I think we see a conservative economic policy that is semi-Reaganite in nature taking place. Ford was moving in a neoliberal direction by 1976, advocating for the end of price controls and less regulation. Economic policy is probably going to be slightly more conservative than Carter’s, all in all - Carter was, after all, the first real neoliberal President. I see Ford supporting the ERA, but I don’t think it will pass; the 1978 midterms will definitely be devastating for the moderate faction of the party and both Reaganites and Democrats will be elected across the country. The recession will probably happen on schedule if Ford doesn’t appoint a neoliberal to the Federal Reserve chairmanship.
Come 1980, I can see Reagan beating Dole out for the nomination and choosing a moderate for VP. On the Democratic side, Ted Kennedy would (as usual) be asked to run but probably decline. In that case, the front runners would likely be Jerry Brown, Mo Udall, and possibly Jimmy Carter. Yes, he would’ve been out of office for six years, but that didn’t stop Reagan. Additionally, party leaders might decide that (assuming Carter only loses narrowly) he’s their best bet as liberals like McGovern and Humphrey were mauled making their run for the Presidency. In that case, we might end up remembering Carter as one of our greatest Presidents...