If Godzilla was fast and relentless, then Hulk wouldn't stand a chance with Frog-Face.
But if the Hulk DID have time to grow mad enough and strong enough to actually fight him, but also remain bright enough to use Godzilla's own size, strength, anatomy, and even his own powers against him, then the odds might actually fall into the Hulk's favor. Especially if Hulk started with clapping Godzilla's flame back into his face, smashed a big enough hole in the ground under his feet to knock him off-balance, then grabbed him by the tail and went to town with the big lizard, Hulk-style...