{
  "factory_source": "https://www.spridgets.de/downloads/Parts-1977.pdf#page=233",
  "photo_sources": [
    "https://www.mgocspares.co.uk/ImageHandler/128268w1000h1000/CZJ645?sequence=128268&width=1000&height=1000",
    "https://www.mgocspares.co.uk/ImageHandler/128329w1000h1000/CZJ645_1?sequence=128329&width=1000&height=1000",
    "https://www.mgocspares.co.uk/ImageHandler/128414w1000h1000/CZJ645_2?sequence=128414&width=1000&height=1000",
    "https://www.mgocspares.co.uk/ImageHandler/128458w1000h1000/CZJ645_3?sequence=128458&width=1000&height=1000"
  ],
  "sections": {
    "left": {
      "projected_gauge_mm": 1.5,
      "estimated_outer_return_projection_mm": 12.7,
      "estimated_profiles": {
        "stepped_inboard": {
          "top_stations_zy_mm": [
            [
              -1710.2666666666669,
              516.4666666666667
            ],
            [
              -1617.1333333333337,
              516.4666666666667
            ],
            [
              -1553.802666666667,
              506.3066666666667
            ],
            [
              -1464.3946666666668,
              501.2266666666667
            ],
            [
              -1442.042666666667,
              467.69866666666667
            ],
            [
              -1337.7333333333336,
              467.69866666666667
            ]
          ],
          "wall_outer_x_mm": 317.50000000000006,
          "return_outer_x_mm": 304.80000000000007
        },
        "tapered_outboard": {
          "top_stations_zy_mm": [
            [
              -1710.2666666666669,
              516.4666666666667
            ],
            [
              -1617.1333333333337,
              516.4666666666667
            ],
            [
              -1553.802666666667,
              506.3066666666667
            ],
            [
              -1337.7333333333336,
              491.06666666666666
            ]
          ],
          "wall_outer_x_mm": 410.6333333333334,
          "return_outer_x_mm": 423.33333333333337
        }
      },
      "limits": "Photo-guided beam side sections; all numerical sections remain estimates.\n\nMGOC CZJ645 views128268/128329/128414/128458 show edge returns,\na changing long section and a stepped end on one wall. They are uncalibrated.\nThe old base, rear endplate, fixing axes and drawing stations are retained by\ncaller. Which wall carries the step in the body frame and mirrored RH form\nare construction hypotheses, not an installed survey or repair template.\n"
    },
    "right": {
      "projected_gauge_mm": 1.5,
      "estimated_outer_return_projection_mm": 12.7,
      "estimated_profiles": {
        "stepped_inboard": {
          "top_stations_zy_mm": [
            [
              -1710.2666666666669,
              516.4666666666667
            ],
            [
              -1617.1333333333337,
              516.4666666666667
            ],
            [
              -1553.802666666667,
              506.3066666666667
            ],
            [
              -1464.3946666666668,
              501.2266666666667
            ],
            [
              -1442.042666666667,
              467.69866666666667
            ],
            [
              -1337.7333333333336,
              467.69866666666667
            ]
          ],
          "wall_outer_x_mm": -317.50000000000006,
          "return_outer_x_mm": -304.80000000000007
        },
        "tapered_outboard": {
          "top_stations_zy_mm": [
            [
              -1710.2666666666669,
              516.4666666666667
            ],
            [
              -1617.1333333333337,
              516.4666666666667
            ],
            [
              -1553.802666666667,
              506.3066666666667
            ],
            [
              -1337.7333333333336,
              491.06666666666666
            ]
          ],
          "wall_outer_x_mm": -410.6333333333334,
          "return_outer_x_mm": -423.33333333333337
        }
      },
      "limits": "Photo-guided beam side sections; all numerical sections remain estimates.\n\nMGOC CZJ645 views128268/128329/128414/128458 show edge returns,\na changing long section and a stepped end on one wall. They are uncalibrated.\nThe old base, rear endplate, fixing axes and drawing stations are retained by\ncaller. Which wall carries the step in the body frame and mirrored RH form\nare construction hypotheses, not an installed survey or repair template.\n"
    }
  },
  "limits": "The paired plain beams are superseded by connected photo-guided stepped/tapered sidewalls and12.7mm outer-return estimates. Base,old rear endplate,T reliefs,stud axes and beam X/Z stations remain. Neither photographed square slots nor long-wall holes are copied into a drilling map. Step side in the body frame and mirrored RH geometry are hypotheses;sections and1.5mm projected gauge are unmeasured. No direct owner dimensions or fitted panel identities are applied. Manufacturer AHA7879/80 damper mount and factory/Mfr CZJ644/645 rear bumper-beam roles are comparisons, not copies or verified repairs. Every profile, gauge, return, axis, bolt map, ear, foot, beam channel/endplate, join and body pose is estimated. Existing damper body/arm/link, upper strap center, axle/spring stations and bumper stud axes are retained drawing datums. Damper ears and four smooth fixing envelopes add shared construction bores outside the old damper box, not an actual casting or bolt map. Upper strap pin retains its old estimated radius/center but gains an outer extension/retainers to pass the new panel; this does not establish fitted hardware, loaded slack, travel or retention. Rear beams occupy a generic open channel above the retained low floor. Their estimated rear endplates follow existing bumper stud axes; two rear-open T reliefs in beam floor/floor panel and narrow matching local-doubler reliefs accommodate the retained low stud reference. These are declared reconstruction corrections, not observed factory openings, fabrication/repair templates or fitted clearance allowances. The old bumper/floor datum conflict is not evidence about the car. Body panels are welded references and remain fixed; added ears share damper display movement, other hardware separates illustratively. No continuous proven load path, weld/lap sequence, impact/jacking/towing/support strength, corrosion/repair state, actual fastener/thread, clamp preload, torque, tool access, suspension travel or verified replacement/cutting/welding/removal path. Bump-stop attachment/strike face and fitted body/axle registration remain unresolved."
}