"NEW" G6 Owner

Well, i'm an original MOPAR guy but i couldn't pass this deal up for my wife. And well since i can't keep anything stock, i had to find me a good forum to see what's out there. From what i've gathered, this seems to be the best forum out here for the G6.

First thing i would like to do is plugs since she's got a bit over 100k oh her as of this morning. I'm searching now, but any good suggestions? Is there a trick to the rear plugs (haven't looked REAL close yet)? And yes, i've changed oil and filters

Second would be to transform to duals. Any good advice on this mod? I guess i need a GTP lower valance but where's a good place to get a nice dual muff?

Thanks a lot in advance!!
Johnny