What dimensions are shown on the main sketch?

The main rectangular/D-shaped sketch shows handwritten dimensions of 13, 6, and 63 (units not stated), plus another dimension along the bottom edge that appears to read 63 or 6 3 but is partly illegible.

Does this document identify a specific vehicle or part number?

No. The sketch contains no vehicle make, model, year, part numbers, or descriptive labels — only dimension numbers and lines.

What is shown in the smaller sketch at the corner of the page?

A stepped profile with arrows and fractional dimensions that appear to read 3/8 and 5 1/4, plus another partially legible value (possibly 2 1/4). The exact readings are uncertain because they run off the edge of the photo.

Are any units given for the measurements?

No units (inches, mm, etc.) are written anywhere on the sketch.

Home/ Registry/ Pontiac/ Firebird/ “bill mitchell”/ Photo supermotors.net/registry/media/1143374

1980 Pontiac Firebird Owner's Hand-Drawn Parts Sketch with Dimensions

Hand-drawn dimensioned sketch of a domed part with numeric measurements

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Hand-drawn dimensioned drawing of a domed mechanical part showing measured profiles.

AI caption December 2018 · Photo 32 of 32

This document is a hand-drawn pencil sketch on plain paper, photographed at an angle and rotated roughly 90 degrees. It is not a printed factory blueprint. The main drawing shows a rectangular outline with a D-shaped (rounded) end, annotated with several handwritten dimension numbers — most clearly "13," "6," and "63" — connected by dimension lines and tick marks. A second, smaller sketch in one corner shows a stepped profile with arrows and what appear to be fractional dimensions such as "3/8" and "5 1/4," though these are hard to read at the paper's edge. A scribbled circular doodle (possibly a wheel, fan, or gauge face) appears in one corner, with no accompanying text. There are no part numbers, no vehicle make/model/year references, no legends, tables, wire colors, or fuse data anywhere on the page. A reader can only learn the rough proportions of whatever part or fabrication project the owner was measuring — likely a template or dimensioned plan for a custom piece — but the sketch alone does not identify what the part is or what vehicle it belongs to. The units of the dimensions are not stated.

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Frequently asked questions

What dimensions are shown on the main sketch?: The main rectangular/D-shaped sketch shows handwritten dimensions of 13, 6, and 63 (units not stated), plus another dimension along the bottom edge that appears to read 63 or 6 3 but is partly illegible.
Does this document identify a specific vehicle or part number?: No. The sketch contains no vehicle make, model, year, part numbers, or descriptive labels — only dimension numbers and lines.
What is shown in the smaller sketch at the corner of the page?: A stepped profile with arrows and fractional dimensions that appear to read 3/8 and 5 1/4, plus another partially legible value (possibly 2 1/4). The exact readings are uncertain because they run off the edge of the photo.
Are any units given for the measurements?: No units (inches, mm, etc.) are written anywhere on the sketch.