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