General Discussion

He assumed office August 9th, 1974.
That term ran through January 20th, 1977.
That would have been just shy of 2 years and 5 months in office.

According the the 22nd:
"no person who has held the office of President, or acted as President, for more than two years of a term to which some other person was elected President shall be elected to the office of the President more than once."

So Ford would have only been eligible to run in one election according to the 22nd amendment.

LBJ, on the other hand, did serve a partial term and was eligible for two elections after it. He assumed office November 22, 1963 for a term that ended January 20th, 1965. So there were less than two years left. He won his first election as President and ran a second time, but dropped out prior to the primary being decided.