2 questions

ok for now i just wanna run true duals off my manifolds and today i was told that if i just got true duals that it would burn my plugs up?

i was told i would have to get a chip to fool the oxygen sensor on the computer so i dont fully understand this.

my question is wat all do i have to do to the car for true duals?

and my other question my rear end is getting a little old and wore out wat kind of rear end should i get if i were to get a new one?

oh yes by the way i have a 1996 z28 all stock

you would have to get the rear o2 sensors tuned out, so the check engine light doesnt come on. the front o2 sensors should be fine. other than that just need to find a shop to do it.