E9TZ-9A758-U is a throttle cable for a 7.3 diesel, not your 302!
AOD trucks used E5TZ-9A758-A, C6 and manual trans trucks used E6TZ-9A758-D.
Both cables are obsolete, but there are dealers out there on the D2D locator that still show them in stock.
Ford Parts Monkey since 1985
1981 F100 Flareside - Black, 302-4V Roller/AOD
1986 F150 Flareside - Medium Fire Red 302/AOD
1989 F150 Standard Cab 4x4 - Dk Shadow Blue 302/AOD
1993 F350 4x4 Crew Cab - 7.3 IDI/ZF-5
I think it's a sickness...