Pontiac concours judging checklist — seven categories from the PHS paperwork chain through the Ram Air IV block-cast authentication

Category 1 of 7

PHS paperwork chain — the auth gate

The Pontiac Historic Services (PHS) paperwork chain is the authentication gate for every Pontiac concours judging floor. The chain carries five items at the standard package, seven at the documented chassis package. The standard package: the invoice (the original bill-of-sale for the car at the dealer, stamped at the top with the dealer name and the dealer zone code); the build sheet (the factory-line sequence card that pairs the engine / transmission / rear axle options to the cowl-tag VIN); the dealer invoice (the dealer-side mirror of the buyer-side invoice); the PHS-stamped certificate (the POCI-issued authenticity card paired to the VIN); and the VIN-derivative plate (the reproduction-card the POCI issues on a per-VIN basis). The documented chassis package adds the engine block authentication (the block-cast code, partial-VIN, and casting date stamped at the front upper quarter of the block); the transmission authentication (the transmission case stamp with the partial-VIN on the Turbo-Hydromatic 350 / 400 box); and the rear-axle authentication (the axle housing stamp with the gear-ratio and date code on the corporate 8.2-inch B-body rear axle).

POCI order lead time

The POCI paperwork order has a 6-12 week lead time on the standard package and a 12-20 week lead time on the documented chassis package. A buyer who plans their restoration around an entry-level local show does not need the documented chassis package; a buyer who targets a national judging floor DOES. The difference is in how to budget the restoration cycle: a buyer targeting PHS-only Recognized budget the standard package and the body-on re-paint cycle; a buyer targeting Award of Excellence budget the documented chassis package AND the body-off rebuild cycle.

Category 3 of 7

Engine block — the 389 / 400 / 455 block-cast decoder

The engine-block authentication category reads at the casting date and the partial-VIN at the front upper quarter of the block, between the timing cover and the #1 cylinder. The casting date must fall inside the cowl-tag build window (the engine block is assembled at the engine plant before the chassis is built; the casting date is typically 4-8 weeks before the chassis is built). The partial-VIN must match the last 6-8 digits of the build-sheet VIN. The 1969-only Ram Air IV block carries a 9790071 / 9790074 block-cast code (production / prototype) distinct from the 1970-onward 455 HO block-cast code 9790086. The cylinder-head casting date must pair against the engine block (the 1969 Ram Air IV heads carry a 1969 head-cast code distinct from the 1970-onward 455 HO head code).

Ram Air IV vs 455 HO block discrimination

The 1969 Ram Air IV is its own block, distinct from the 1970-onward 455 HO block. The discriminator is the block-cast code and the cylinder-head casting date. The 1969-only 9790071 / 9790074 block-cast code reads at the front upper quarter of the block; the 1970-onward 9790086 block-cast code reads at the same location but produces a different casting thickness, a different timing-cover pattern, and a different crank-positioning stamp. A buyer chasing numbers-matching on a 1969 Ram Air IV must verify the block-cast code BEFORE any disassembly.

Category 5 of 7

Interior — the PHS-documented trim code

The interior authentication category reads at the PHS-documented trim code (the 1969-only trim code ladder includes the 411 standard black / 412 standard blue / 413 standard red / 414 standard green / 415 standard saddle / 416 standard parchment / 421 deluxe parchment / 422 deluxe red / 423 deluxe blue / 451 custom black leather / 452 custom red leather / 453 custom blue leather). The trim code is verified against the build sheet and the cowl tag; the seat-track stamping is verified against the build sheet (the seat-track stamping carries the partial-VIN at the outboard mounting flange). The headliner tag is verified against the cowl-tag build date (the headliner tag carries the dash-side stamp and the build-week date stamp).

Trim ladder authentication pitfalls

A reproduction interior trim catalog ships with a 1970-onward trim ladder that includes codes the 1969 cowl tag does NOT have (the 1969 standard saddle is 415, NOT 417 the 1970-onward saddle). A buyer restoring a 1969 interior with a reproduction catalog ships a trim pattern the 1969 cowl tag does not authenticate. The PHS paperwork chain reads at the original trim codes, NOT the reproduction trim codes.

Category 6 of 7

Judging-floor presentation — engine-bay detail, underbody, trunk

The judging-floor presentation category runs three routes at sequence. The engine-bay detail reads at the 1969-only Ram Air IV decal placement (the 1969 RA IV hood decal carries the year-only stamp), the reproduction-engine-bay detail (the reproductions ship with a 1970-onward pair pattern that does not match the 1969 decal placement), and the date-coded component placement (the 1969-only date-coded components have to land inside the build window). The underbody cleanliness reads at the suspension arms, the steering linkage, and the exhaust hangers (a buyer who leaves a 1970-onward reproduction exhaust hanger on the 1969 chassis surfaces a year-wrong trim). The trunk presentation reads at the trunk-to-quarter seam, the spare-tire well, and the trunk-lid gasket.

Looking at the chassis at the heavy-frame level? The 1969 Pontiac GTO restoration guide runs the cowl-tag-to-block authentication end-to-end.