An AIM-9 will easily track a decent IR source, regardless of target velocity. A diesel exhaust from a tank or truck is more than adequate, and the missile would likely guide with no problems so long as the background isn't too hot. With the missile enroute, the next step is fusing. A-A fuses are contact and proximity, and there is no way to select/deselect one. As the missile approaches, its prox fuse will likely be triggered by mother Earth too early to be effective against anything even moderately armored. Thin-skinned vehicles or radar might take acceptable damage, though.
The warhead is optimized for the flying fuel tanks that are airplanes. They deliver large volumes of pyrophoric debris at high velocity, but nothing remotely that might be considered lethal to armor. So you might trash a truck or car, definitely would trash a radar (if you have a heat source to track), but real armor would probably remain unharmed.
AIM-7/AIM-120 - same fusing problems, same warhead problems, but more importantly, no doppler signal. Anything on the ground would be seen as a rock, a tree, and couldn't be tracked to begin with. There is some potential to track RF signals, but that is the realm of HARM and similar.
This is outside my expertise, but I would have to say no. Tiltrotors combine helicopter and fixed wing functionality, but we already have superb platforms for both when it comes to delivering ordnance. I cannot imagine an Osprey ever coming close to the performance of either an A-10/AC-130, or an Apache, and its unique mechanism makes it a bit more vulnerable than any of the traditional attack assets.Subject tiltrotors: Do you ever see tiltrotors supplanting helos and or the ac130 in slow CAS?