Giant-Size Super-Stars #1 (Pt 46) Thor, Thing, Torch

1969: Thor #163 Kirby

1974: Giant-Size Super-Stars #1 Buckler

And yes, I know the "Thing" here is really the Hulk--but I'm going for the alliteration, damn it! ;)

Giant-Size Super-Stars #1 (Pt 45) Thor, Hulk,Thing--Plus Super-Skrull!

1967: Thor #142  Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 44) Thor, Ulik, Hulk and Thing

1968: Thor #152  Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 43) Thor's Growing Man and the Hulk

1967: Thor #140 Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 42) Herc 'n' Hulk--Down for the Count?

1966: Thor #130  Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 41) Classic Bruce Bob Banner

1964: Fantastic Four #25 Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 40) Classic "Flying" Hulk

1963: Incredible Hulk #5  Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 39) Hulk, Ulik, Thing and Thor

1974: Giant-Size Super-Stars #1
Buckler

1967: Thor #137  Kirby

Giant-Size Super-Stars #1 (Pt 38) Classic Hulk

L: Giant-Size Super-Stars #1 (1974) Buckler
R: Fantastic Four #25 (1964) Kirby

Giant-Size Super-Stars #1 (Pt 37) Coffee Talk

        1967: Fantastic Four 68 Kirby                    1974: Giant-Size Super-Stars 1  Buckler

Giant-Size Super-Stars #1 (Pt 36) In This Corner: The Incredible...

Aww, you peeked!

L: Fantastic Four #25 (1964) Kirby  
R: Giant-Size Super-Stars #1 (1974) Buckler

Giant-Size Super-Stars #1 (Pt 35) Hulk 'n' Herc

1974: Giant-Size Super-Stars 1
 Buckler

1966: Thor 130  Kirby

Giant-Size Super-Stars #1 (Pt 34) Hulk, Iron Man, Thing and Sub-Mariner

1966: Tales to Astonish 82 Kirby

1974: Giant-Size Super-Stars 1 Buckler

Giant-Size Super-Stars #1 (Pt 33) Iron Man, Hulk, Sub-Mariner and Thing

1966: Tales to Astonish #82  Kirby

1974: Giant-Size Super-Stars #1 Buckler

Giant-Size Super-Stars #1 (Pt 32) A Soarin' Torch 'n' Thor

1974: Giant-Size Super-Stars #1 Buckler

1969: Thor #166 Kirby

Giant-Size Super-Stars #1 (Pt 31) Hulk, Thing, Iron Man and Sub-Mariner

1974: Giant-Size Super-Stars #1 Buckler

1966: Tales to Astonish #82  Kirby

Jack Kirby stepped in at the last minute and finished up the Sub-Mariner Astonish story for Gene Colan, who'd penciled a couple of pages before succumbing to the flu. Yes, even a Kirby rush job provides inspiration!

Giant-Size Super-Stars #1 (Pt 30) NYC Subway

1974: Giant-Size Super-Stars #1 Buckler

1964: Fantastic Four #26  Kirby

Giant-Size Super-Stars #1 (Pt 29) Thundra and Adam Warlock

1974: Giant-Size Super-Stars #1  Buckler

1969: Thor #166  Kirby

Giant-Size Super-Stars #1 (Pt 28) Pulled From the Pages of Fantastic Four #52

1974: Giant-Size Super-Stars #1  Rich Buckler

1966: Fantastic Four #52  Jack Kirby

Note that both panels involve the FF testing new aircraft given to them by the Black Panther. Did the penciled art remind Gerry Conway of FF #52, or was he the one who suggested the scenario/specific issue to Rich Buckler? In any event, the GSSS #1 dialogue and art provide continuity to the Lee-Kirby FF. 

Plus! I then noticed these on the same pages as above: 

1974: Giant-Size Super-Stars #1

1966: Fantastic Four #52 

The panels on the pages: 

Fantastic Four #52 (1966) Kirby                              Giant-Size Super-Stars #1 (1974) Buckler

Giant-Size Super-Stars #1 (Pt 27) Thundra and Hercules

1965: Journey Into Mystery Annual #1  Kirby

1974: Giant-Size Super-Stars #1  Buckler