The "5.0" fender badge was first introduced on the 1979 Ford Mustang and it was used to designate the vehicles 5-liter 302 cubic-inch Ford small block V-8. From 1979 - 1993 many refinements were made to the 5-liter V-8 but one thing which stayed constant was the "5.0" fender badge.
According TheMustangSource, the"5.0" fender badge will make it's return for the 2011 Ford Mustang GT. The forum member came by way of this news doing a little detective work in the Ford parts database finding a part number for the 2011 "5.0" badge.
The "5.0" badge with it's black trim and two chrome numbers with a red dot in the middle was probably one of the most recognizable fender badges of the 70's, 80's and 90's. Will the "5.0" fender badge return in past form or will it be modernized to fit the times, until then your guess is as good as mine. I am just glad the badge will return for the 2011 Ford Mustang GT.
I was looking at the Ford Performance Parts catalog today and was thinking that the 4.6 and 4.0L blocks are alumminum I think so the block for the new 5.0L maybe this one here since it is already in production and can easily be utilized by Ford Enginners and Its also the block used for the Cammer. http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=6315
And rumer has it that the 2011 or 2012 GT500 is going ot lose the 5.4L in favor for a supercharged 5.0L.