Elections when both major candidates were Conservative/Liberal

[Rockefeller GOP]

In 1976 I think Carter may have been more conservative than Ford

And you'd be wrong.  Southern accents and being an evangelical have zero impact on one's conservativeness.  Also, Moderate Hero Republican, while Parker was from the more conservative wing of the party, I think it's pretty clear Coolidge was more conservative...

[Rockefeller GOP]

In 1976 I think Carter may have been more conservative than Ford

And you'd be wrong.  Southern accents and being an evangelical have zero impact on one's conservativeness.  Also, Moderate Hero Republican, while Parker was from the more conservative wing of the party, I think it's pretty clear Coolidge was more conservative...

Parker, not Davis. 1904, yo.

LOL, ah, my bad!

[Rockefeller GOP]

1916  Wilson (D) and Hughes (R) both liberal

1924  Davis (D) and Coolidge (R) both conservative

1940  FDR (D) and Willkie (R) both liberal

1944  FDR (D) and Dewey (R) both liberal

1948  Truman (D) and Dewey (R) both liberal

1952  Stevenson (D) and Eisenhower (R) both liberal

1956  Stevenson (D) and Eisenhower (R) both liberal

1960  JFK (D) and Nixon (R) both liberal

1976  Carter (D) and Ford (R) both conservative

It's not real complicated.  The nation became significantly more conservative after 1965 and Southern Democrats progressively became Republicans at all levels to the point where mostly all Southern elected officials became Republican.

Eisenhower was not liberal, and it's laughable to say Carter was a conservative.