{
  "baseline_commit": "a7387fc6",
  "schema": "intake-manifold-gallery-v1",
  "classification": "factory_family_and_donor_architecture_with_estimated_sections",
  "owner_dimensions_applied": false,
  "factory_source": "https://www.spridgets.de/downloads/Parts-1977.pdf#page=65",
  "supplier_source": "https://robertpieces.com/en/used-parts-for-british-cars/4349/intake-manifold-triumph-spitfire-from-1975-nla-up-to-commission-110%2C000-detail",
  "supplier_image": "https://robertpieces.com/images/stories/virtuemart/product/TKC2857.jpg",
  "held_head_mouth_centers_yz_mm": [
    [
      44,
      -112
    ],
    [
      44,
      -62
    ],
    [
      44,
      62
    ],
    [
      44,
      112
    ]
  ],
  "held_head_mouth_radius_mm": 12,
  "held_head_face_x_mm": -88,
  "estimated_collector_center_xy_mm": [
    -125,
    43
  ],
  "estimated_collector_outer_radii_xy_mm": [
    24,
    21
  ],
  "estimated_collector_inner_radii_xy_mm": [
    17,
    14
  ],
  "estimated_collector_z_bounds_mm": [
    -133,
    133
  ],
  "hidden_coolant_channels_reconstructed": false,
  "estimated_end_spigot_axis_xy_mm": [
    -125,
    35
  ],
  "estimated_end_spigot_bore_radius_mm": 6.5,
  "estimated_unmodeled_inner_boundaries_z_mm": [
    -130,
    130
  ],
  "estimated_water_spigot_mouths_mm": [
    [
      -125,
      35,
      -190
    ],
    [
      -125,
      35,
      170
    ]
  ],
  "estimated_water_spigot_outside_radius_mm": 8.5,
  "limits": "Factory Parts-1977 plate65 distinguishes the TKC285 USA/Canada single-carburetor manifold from RKC723. The TKC285-labeled donor photo supports paired head flanges, a longitudinal collector and two axial end-spigot roles; fitted identity/material, dimensions, end orientation and hidden sections are unverified. The new collector length, paired flange plan, runner paths, two spigots/beads and air cavity sections are construction estimates. Head-mouth centers, nominal mouth radii, head/carburetor mounting planes, carburetor, cleaner and body poses remain. No159942 emissions-adapter port is assigned as coolant. Coolant bores stop at explicit unmodeled inner boundaries near the collector end caps; these are reconstruction boundaries, not actual blind ports, plugs or a claimed waterway section. Hidden coolant continuity, pressed-tube/casting joints, capacity and pressure behavior are not reconstructed. Old pipe/hose endpoints stay unjoined; no fitted hose branch, loaded clearance, temperature behavior, drain/release order or removal path is established.",
  "owner_evidence_scope": "Existing owner photos establish the single-carburetor assembly and surroundings, but do not dimension or expose these hidden casting/port details.",
  "procedure_scope": "Factory parts plate and donor architecture comparison only. The available AKM4071/B segments omit USA manifold/exhaust pages130\u2013132; no UK manifold procedure or actual-car replacement path is promoted as applicable."
}