I know this doesnt help much, but between the mic on your phone & my little computer speakers... I dont really hear any "knocking" noise in any of those vids, especially the recent one holding against the brake in reverse & drive, just sounds like a motor under load, no other "major" noises. But that doesnt mean much since small noises can be lost or masked when recorded on a phone & played back on another phone or small PC speakers.
Resting the car on the rotors probably isnt a good idea, but shouldt harm anything if done once or twice, but the weight of the car focused on 1-2" of the bottom edge of the rotor is a totally different force than calipers clamping on the sides as designed.
Ive pulled a few engines from the side when the nose was too long to get the boom arm of the puller to reach the engine, especially 79-81 cars. Most 2 ton pullers should reach from the side, the pump body will just about touch the fender but the arm should reach enough to pull it, drop the nose of the car as much as it will go & remove tires (without rotors touching) then extend the puller arm to the 1/2 ton range & see if it fits... if not, pull the nose or fender as a last resort. Good luck if you decide/need to pull it!
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