Standard garage header mounting
Homes from the early 80s were built with slightly taller garage openings and factory-mounted steel jamb brackets, which means less time spent shimming a mounting plate or rebuilding a header to take the new unit's weight. On a typical single door in one of these houses, the swap-out itself - old opener down, new rail and head unit up, travel and force set, safety sensors aligned - runs a controlled job rather than a fight.