If it got that hot, could have out of round cylinders, head could be warped, crank should be easy to check look at bearings and if there shot check crank for damage, if he ran it out of oil you will have to check cams and lifters, hopefully thats not the case, If the cylinders are out of round you will need to have them replated, if not have them honed so that the new rings will seat good, I have 3 stock pistons and rods if you need any, cheap there just taking up space. I have never used any special tools just your basic metric tool box should do the trick, not as difficult as some make out. its just 4 cylinders with two cams, just pay attention to how it came apart label and take pictures if you need, be careful with shims under lifter buckets, they are all different so keep them in order and when you go back together with it make sure they all are in properly.