can i swap a 4.6 2005 with a 2007 4.6 ?

Test the alternator. Maybe it is actually overcharging.

i actualy had it check and its good !!

are the wires in the wiring harness the same ? because my mecanic is going to cut the middle plug that come out of the body that goes to the cpu and splice it with a 2007 one that what my mecanic says might be the problem?

Due to the electronics you may need to either swap the alternator to the year engine you have or to the car year. I would try it both ways and see what happens.

Cutting and splicing. I think you are well into the danger zone. Good luck cuz you need it.