I have some MMC650s and plan to get the MMC690s

the problem I'm having is that sites like crutchfield say that none of the MMC speakers will fit my car. The mounting depth is very similar frop top and bottom from the db series and they fit.

the car i'm trying to install these on is a 2004 SRT-4 (neon chassis)

any suggestions? thanks guys

-Mitesh