So you have door panels with spots for the 5 1/4s right? If thats the case, put em in! I dont know if your panels have tweeter holes in them or if they come with speakers already in them. If you do, dont worry about the factory tweeter you can still hook it up, its your choice. Those speakers should drop right in. But if your using the original plastic shrouds they mght have air gaps around the sides of the speaker because the original speaker is sort of square shaped so a perfectly round speaker might not fill the gaps. At least mine did, yours might be differant. Theres no reason why you cant still use the speakers you bought.
"-@--------@--" 1990 SSE " Black Ice " 220,000+ kms, GX3, sunroof
16" Streetwear Diablo wheels | Blazer Fog Lamps | Silverstar 9005 low beams | Mesh Grille | STB | '94 Top end | Delco Type 2 Ignition | Blue interior LEDs | LED 3rd brake light | Auto-dimming rear view mirror | Pioneer DEH-P7600MP | Rockford 5 1/4 Components and 6x9s
Daily driver : '95 Buick Regal Custom | Blue under dash LEDs | Infinity 5 1/4 components | 8 Inch sub under dash | 12 inch Bazooka sub in trunk | Rockford 4 ch amp | Trunk mounted EQ | Pulsing trunk LEDs