Fantastic Four #143 (Pt 9) Leaving On a Jet Cycle

1967: Fantastic Four #64   Jack Kirby

1974: Fantastic Four #143  Rich Buckler

Fantastic Four #143 (Pt 8) Dr. Doom and the Sentry Sinister!

1967: Fantastic Four #64  Jack Kirby

1974: Fantastic Four #143  Buckler

Fantastic Four #143 (Pt 7) A Pensive Johnny, in Jail and in the Air

Fantastic Four #143 (1974) Rich Buckler

    

Fantastic Four #119 (1972) John Buscema

Fantastic Four #143 (Pt 6) Men at Work...

...at Dr. Doom's complex--and also at the Beehive's Citadel of Science.

 Fantastic Four #143 (1974) Buckler                  Fantastic Four #67 (1967) Kirby

Fantastic Four #143 (Pt 5) Marvelous Medusa

Suggested by? Maybe.

1973,  FF #136  J. Buscema

1974,  FF #143 Buckler

Fantastic Four #143 (Pt 4) Darkoth, Reed Richards and the Gang

Fantastic Four #143 (1974) Rich Buckler

Fantastic Four #71 (1968) Jack Kirby

Fantastic Four #143 (Pt 3) Dr. Doom's Terrible Triumph

Fantastic Four #143 (1974) Rich Buckler/Frank Giacoia

Fantastic Four #64 (1967) Jack Kirby/Joe Sinnott

And sure enough,  #143's Reed and Medusa are patterned after #64's Reed and Sue! 

Fantastic Four #143

Fantastic Four #64

Fun fact: Marvel's Greatest Comics #47 reprinted FF #64 with the Kirby cover slightly tweaked by John Romita Sr. and was on sale about a month prior to FF#143. 

Honorable mention: Fantastic Four #14's cover 😉

Fantastic Four #143 (Pt 2) Sue Richards--Drama Queen

                                           

Top: Fantastic Four #143 (1974) Rich Buckler/Frank Giacoia

Bottom: Fantastic Four #109 (1971) John Buscema/Joe Sinnott

Lichtenstein would have loved Sue  😉

         

1964

Fantastic Four #143 (Pt 1) Dr. Doom and Medusa

Fantastic Four #143 (1974) Rich Buckler

Fantastic Four #84 (1969) Jack Kirby

Note: based on the preceding panels and the dialogue here, I think this is a pic of Johnny, but the colorist thought it was Reed.