Dont take it so bad man. All in fun, messing with the FNG.
I dont think I would put the wrong size engine badge on there, but there are a ton of shelby snakes on non shelby cars.
Do something you like find something you like. I will be doing something different myself on mine.
Ebay some old ford emblems they had some really cool looking badges that were around in the 40's

 

There are tons of places that make custom badges to look like the old ones, but say whatever you want. If you want the old look, try one of those.

 

and yes, i stole that pic from ninteen66mustangWhile you are at it try these things. sure fire way to get some added HP!

but seriously i wouldn't be able to drive a car with badges on it that don't belong. but to each their own!

 

Most often in the day, the badges were removed or changed toreflect asmaller engine in hopes of luringa victim into a race. Ofter the guys would not raise the hood. On the flip, a few years ago their was a imitation new Shelbythat had all the correct emblems andrims,dash, yada, yada, and this fellow refused to raise his hood. I don't think they had been released yet to the public, but he said he had one. Hewas deemed a fraud and the word spread thru the show very quickly. After so, he was not to be found around his car untill the end of the show when everyone else had left.

 

if youre just looking for a way to customize your new mustang...

www.ponybuilder.com