Front Speaker Mounting Depth

[metalli445]

Does anyone know what the maximum mounting depth is for the front speakers in a 2005 Dodge Ram? I want to buy a set of 6.5" components that have a mounting depth of 78.5mm but for the life of me I can't find any specifications giving me an exact max mounting depth. Thanks for any help. Documentation would be cool as well.

 

[Red Sleeper]

The fronts are 6"x9" in an 05.. Can I ask why you want to put 6.5'' in there?