What Was He Packing?

In Werewolves (the greatest horror movie ever made), Frank Grillo turns into a werewolf to fight the superwerewolf near the end of the movie. When this happened, he grew significantly in size and became a lot hairier than he is normally. To maintain the movie’s authenticity, Frank Grillo actually did this by injecting himself with experimental modified wolf dna. When he did this, did everything grow in size? We all know Frank Grillo has some huge meat which is why he needed Willem Dafoe to be the body double for him back in his nude modeling days, but did it grow even bigger when he became a werewolf?