Well usually but not always when the engine lays back on some cars with soft mounts the cap hits the firewall and cracks it with a small block. Been there so we always remove the cap and rotor so the rotor don't hit and break the tip off when turning the engine to get the converter bolts off. Even with steel mounts you have to loosen them, Drop the back down to get the top trans bolts. Big blocks don't matter. just put pads between the valve covers and the fire wall. On big blocks we usually unplug the bulk head connectors and push the bulk head in the car. Then move the harness ends to the side so not to smash them. Just cautionary procedures.
