Giant-Size Avengers #1 (Pt 62) Johnny Storm and Whizzer

1970: Fantastic Four #99 Kirby

1974: Giant-Size Avengers #1
Buckler

Giant-Size Avengers #1 (Pt 50) Thor and Whizzer

1974: Giant-Size Avengers #1 Buckler

1964: Avengers #6 Kirby

Giant-Size Avengers #1 (Pt 36) Avengers and Inhumans, Faces In a Crowd

1969: Fantastic Four #83  Kirby                    1974: Giant-Size Avengers #1 Buckler

Giant-Size Avengers #1 (Pt 34) More Captain America and Whizzer

             1974:Giant-Size Avengers 1 Buckler           1967:Tales of Suspense 92 Kirby                                                     

Giant-Size Avengers #1 (Pt 30) More Scarlet Witch, Whizzer, Sue and Reed

G-S Avengers #1 (1974) Rich Buckler

Fantastic Four Annual #1 (1963) Jack Kirby

VERDICT: Maybe.   Definitely not a slam dunk

Giant-Size Avengers #1 (Pt 25) Scarlet Witch, Whizzer, Sue and Reed

Giant-Size Avengers #1 (1974) Rich Buckler

Fantastic Four #50 (1966) Jack Kirby

Giant-Size Avengers #1 (Pt 23) Scarlet Witch, Whizzer, Ben and Reed

Giant Size Avengers #1 (1974) Rich Buckler

Fantastic Four #78 (1968) Jack Kirby

Giant-Size Avengers #1 (Pt 17) Thor's Stern Profile

GS Avengers 1 (1974) Buckler

Tales of Suspense 86 (1967) Kirby

               

Fantastic Four 31 (1965) Kirby--
Inspiration for Thor's GSA face?

Giant-Size Avengers #1 (Pt 11) Captain America's Ups and Downs

Giant-Size Avengers (1974) Buckler

Tales of Suspense 92 (1966) Kirby

Giant-Size Avengers #1 (Pt 9) The Whizzer and Alicia Masters

Giant-Size Avengers #1 (1974) Buckler

Fantastic Four #55 (1966) Kirby

Giant-Size Avengers #1 (Pt 7) Captain America and Whizzer Again

Giant-Size Avengers #1 (1974) Buckler

Captain America #105 (1968) Kirby

A possible inspiration-This image of Wanda has always reminded me of Crystal from Fantastic Four #45. Sure, it's not a slam dunk like Cap/Whizzer above--it's mostly the shape/length of the foregrounded leg, the shading to hint at the other leg in the background, set of the torso, etc.--but I love both Wanda and Crystal, so I'm including these! 

Fantastic Four #45 (1965) Kirby

Giant-Size Avengers #1 (Pt 5) Captain America and the Whizzer

Giant-Size Avengers #1 (1974) Rich Buckler

Captain America #103 (1968) Jack Kirby

Giant-Size Avengers #1 (Pt 3) More Fantastic Four

More Fantastic Four recalls in Giant-Size Avengers #1.

1974: Giant-Size Avengers #1 Buckler            1968: Fantastic Four #79 Kirby

1974: Giant-Size Avengers #1  Buckler               1970: Fantastic Four #99   Kirby                 

1974: Giant-Size Avengers #1 - Rich Buckler

1967: Fantastic Four #61 - Jack Kirby

                                                                      
                                                                         
                                                                            

Giant-Size Avengers #1 (Pt 2) Fantastic Four Annual #4

It's well known that there's a lot of Fantastic Four Annual #4-inspired art in 1974's Giant-Size Avengers #1--check out some examples below. And yes, I previously posted a few of these back in March 2010 over at Van Plexico's Avengers Assemble forum--but I really like these, so I'm reposting 'em here! 

Buckler GSA #1 (1974) on the left;  Kirby FF Annual #4 (1966) on the right. 

And bringing up the rear...oh, and in case you were wondering: that's Miss America and the Whizzer in the panel on the left; and  Johnny Storm and Wyatt Wingfoot on the right. 

Top: Giant-Size Avengers #1 (1974) Buckler

Bottom: Fantastic Four Annual #4 (1966) Kirby

Top: Giant-Size Avengers #1 (1974) Buckler

Bottom: Fantastic Four Annual #4 (1966) Kirby