Hmmm.. I like the 64 Godzilla design just like I love the rest of them. The only thing that's kind of bothered me about the costume was his "wiggley" upper jaw/lip/snout (I think I read somewhere that this was caused from when Godzilla crashed in to the Osaka castle?), luckily they fixed that for Ghidorah, the Three Headed Monster.
Great reading on the subject of suits:
