Hi i have a 88 mazda plus cab b2200 i believe the rear is 6 1/2 and the front door has 5 1/2 but would like to run all 6 1/2's also there are " i believe 4" " in the front dash. i have an sundown sax 100.4 for these. im going to run 2 sa 8 v2 on a saz 1500. please help i have no idea. thanks if you need more info let me know. I have a few more ? but ill ask in other fourm