Floyd has fought better body punchers than Pac and never took any serious shots..lol I guess that changes now. LOL. But Pac is now a body puncher b/c he landed some on a guy coming forward with a high guard and not one ounce of movement....
He's used the high guard style against every southpaw hes'; faced. That's because a shoulder roll isn't very effective on a southpaw. Which is why Manny will give him a lot of trouble.
... "He wouldnt throw punches so I let him hit me so hed open up, Pacquiao said. http://www.philstar.com/Article.aspx?articleId=558456&publicationSubCategoryId=63
I'd still argue that he's much better off using his usual shoulder-roll against Pac, with a lot of movement. If he uses the high guard I would bet on Pac to not only win, but genuinely hurt Floyd in the process.