In a house from this period, the opener problem usually starts quiet: the door hesitates before it starts moving, or it needs two tries on the remote before the motor catches. That's a worn capacitor or a gear set starting to strip, not a door problem. A grinding or clicking sound mid-travel, especially on a chain-drive unit, usually means the chain's stretched past its adjustment range. If the door reverses for no reason partway down, check the sensors first - on a house with this build date, the original photo-eyes may be misaligned or just old enough to fail intermittently. None of that is a torsion spring issue; it's the motor and drive, and it's usually cheaper to fix than the panel it's lifting.