Eight years and three weeks after the july 2, 1974 release of this film, actor Vic Morrow is tragically killed on July 23, 1982 on the set while filming The Twilight Zone movie.
The aircraft shown taking off at the beginning of the film is a TWA Boeing 727-31, built in 1966, registration N842TW. It was scrapped in 1988. It can be seen in archive footage in the documentary When You're Strange (2009).
Director of photography Duke Callaghan was injured he he was hit by a stunt car during the last week of production.
During the chase of the paper company's van, the first helicopter is a 1967 Bell 206A JetRanger, registration N1369X, which is one of the first of these iconic aircraft produced, having serial number 8. It was exported to Canada in 1977 with registration C-GQKV. It crashed and was destroyed on 31 March 1998. It can also be seen in Summit Meeting: Part II (1967).
The $10,000 in cash the Chief finds on Sneed would equate to over $55,000 in 2019.