stock speakers

Ok. was just wondering if anyone knew the dimensions of a 93' base models front and rear speakers. My friend just replaced his new 350z's stock speakers and is offering them to me for 20 bucks. They sounded a hell of alot nicer when they were in than my GT's and they all are 6 1/2's, all four. I was just wondering If they would fit. thanks

front dash are 2 1/4
door are 6 1/2
rear are 6x9