If he'll gut them for free...why not? But, you may not pass the sniffer after you do.
As for dumps, they're illegal so that'll fail you right off the bat. The law states that you must have tail pipes that exit behind the cabin...i'm still not sure how Ford got away with the side exits....maybe that's far enough back, but still dumps i think they'll just say "oh you don't have tail pipes" and fail you.
What i would do is save your stock H pipe with the cats and just save up and buy a used offroad H or X, and swap out the stocker when you need to get tested. As for mufflers...this depends on your taste so i'd suggest doing a search and listening to the 100s of clips on here of various setups. Myself, i'm partial to Magnaflow, Mac and Spintech, but there's a ton that sound awesome and perform well too.