I think I've read here that the 7317 is just a longer version of the 6607, and all other characteristics are identical. So is it safe to say that the 7317 can be used for any application specifying the 6607 provided there's sufficient physical clearance for the filter to fit in the engine compartment? Also, is there any inherent advantage to using a larger filter other than the obvious extra contaminant-holding capacity? The reason I ask is Fram doesn't make an Extended Guard version of the 6607 (specified for my application) but they do for the 7317 and the Extended Guard is the only Fram I will use so I'd like to use the Extended Guard 7317 in place of the PH 6607) Thanks!