How to identify inectors

[Brands5.0]

I picked up what i was told are a set of Bosch 72lb injectors but they have the same numbers as the stock injectors on my 2007 gt500. Only difference is they all have 750 engraved on the connectors

 

[07 Black Beauty]

They're probably stock injectors that have been modified to 72#.

 

[19COBRA93]

Sounds like modified stockers to me too.