Did you also do sway bar bushing? I would try moving the car manually pushing on it up and down on the radiator support and then also on rear bumper to try and recreate while it is parked, it's possible sounds is coming from somewhere else then the front.
It xould be motor or transmission mount. One way to test that ne is with hood open hold down brake all the way and give it some gas while running in gear. You don't need to floor it just enough to put a load on it.