I know I've had trouble with replacement motor/trans mounts vibrating in the past. I don't think aftermarket ones are as good as the factory ones. Those types of rubber are made to damp out vibrations in certain ranges, the factory will spend MILLIONS to perfect their setup. Aftermarket only concerned with providing a part that can bolt up to your car, many times a part that looks great will produce vibration that old factory one didn't. Anchor brand comes to mind here as a troublesome one, not pliable rubber, more like a soft plastic, they suck. Having said that, contours are supposed to have a special dealer tool "powertrain alignment tool" to bolt in place of the front radiator area mount. Then the others are installed, that tool removed (it took the place of the front roll restrictor), and front roll restrictor bolted in. I know that when done, all centers of mounts should be pretty much centered in the part they bolt up to. The center should not be way off to one side and the rubber should not be squished all out of shape on one side. You may have to loosen other mounts and jack motor/trans up/down, sideways to get them all pretty close to the middle. Make sure any metal part of the mount does not come close enough to mounting area so that flexing allows it to touch metal to metal. Have seen a funky designed mount to where had to grind off part of metal to provide clearance, mount was made to fit more than one application.