Yeah, no chance of re-assembling it as a toy after modding it. Never got it 100% working though and lost interest in it but still got it kicking about and might try again some point. Used small servos the last time but they were both slow and weak. I reckon the micro gear motors would probably work quite nicely for it (and most other pullbacks).

If you have two motors in Panic Attack set up in diagonal orientation, that would give a 4WD-esque performance and free up some internal space. A servo for the lifting forks (the sliding mech is already there), a small 4ch receiver and some servo boards to control the drive motors would see that one easily converted to full RC.