GM 6 speaker

I have a 93 GTP with a 6 speaker system. I was wondering what the impedance is on the front 4 speakers (2 in dash, 2 in door)?? Right now I have tweets in the dash, and 4X6's (4 ohm) in the door. I'm thinking of hooking up the front 4 speakers to my amp instead of the rear speakers, and was going to wire them in at the head unit (where the are only 2 sets of wires for the 4 speakers - lf+, lf-, rf+, rf-). Will wiring them in at the head unit provide the proper load on the amp (4 ohms)??

The amp will be able to handle the load. Most of these speakers are parallel wired and the impedence will be all over the map once power is applied.Top Secret, I can tell you but then my wife will kill me.