Hey im also curious about the MSD coils. MSD has been around forever and I have had friends who upgraded their cars and trucks with MSD ignitions and they have rarely expierenced problems. But I know there are a lot of people saying that motorcraft is the best to use simply because its what Ford uses for their vehicals. I know from expierence that some vehicals are picky about what parts are used, but MSD is also a very reputable company and has been used for years on all makes and models. I'd go with them if no one else has had a lot of problems with them.

 

Nevermind I just did some resarch on that they don't make them for a 5.4 liter but they do make them for a 4.6 liter