All trout require cool well oxygenated water. Seasonal stocking might be considered, but I have no idea how easy it is to source tiger trout.
First and foremost, Mitch, you need to remove those carp. Having 400 pounds of carp in a one acre pond is bad news. I imagine water clarity is very poor.
Your best bet, honestly, is to completely kill this pond. If you can, I would drain it, deepen it another 6 feet or so, make sure everything that was in it previously is gone. Then you'll have a clean slate and entertain those out of the box species you want to.
