Most of the garage doors we see called in from Rowland Heights went up around 1976, which puts them square in the run of steel sectional doors that replaced the old wood swing-outs - wider two-car openings, torsion springs mounted on a center bracket above the door instead of the side-mounted setups you'd find on something built a decade earlier. That's the hardware we load before we leave Fullerton for a call out here: torsion springs in the sizes that era used, standard-width tracks, and the roller and cable sizes that fit a 16-foot double door rather than the narrower single-car openings common in older tracts. We're not guessing on the truck - a door built in 1976 has a known parts list, and we carry it. What we don't carry is anything custom or discontinued; if a prior owner swapped in an odd-sized opener rail or a specialty panel, that's a parts-order job, not an emergency one, and we'll tell you that on the phone before we drive out.