what are the factory speaker sizes in the dash and doors on a 88 gt?

 

3 or 3.5 in dash?? and 5 inch in doors?? I may be wrong

 

3.5 in dash i got 6.5 ich in doors, but i had to drill a hole for the screw to fit, 6x8 in back, the doors call for a 6.5 where i got them but i guess they were wrong, either 5 1/4 or 6.5 will fit. Id recomend 6.5 they willl give better sound.