These storyboards can be seen in full at the Sunbow and Marvel Productions Script/Storyboard Archive.

The storyboards for this scene basically match up with what's seen in the movie. There are a couple of differences with dialogue placement -on the storyboards, Hot Rod calls out his friend's names after he's used his buzzsaw. In the movie, he says their names before he does this.

The storyboards lack some dialogue of Hot Rod and Kup calling out each other's names.