I know this has been beatin to death... but a I'm thinkin of changing most the coils in my 97' Mark viii... I have 2 new ones in there already... but I can tell that a couple are gettin a little weak... haven't thrown any codes yet but sometimes it's a little rough to go... my ??'s are... would having different brands do something bad?... also is there any brands that are better?... they all kinda seam to be around the same price... the only difference I can see is the connector and maybe the silicone boot... but is there really that big of a difference?... I saw on Ebay some guy selling a set of COP's out of a mark viii for 100 bucks... thought maybe I could do that... any tips or suggestions?

Try this (http://www.rpmoutlet.com/musv8wgf.htm#1)