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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.

    Source document

    docs/rpo/buick/riviera.md

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    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Riviera page.

    Buick Riviera (1963–1982)

    Personal-luxury E-body (B-body based through 1965; E-body 1966-on; downsized B-frame 1977–78; FWD E-body 1979-on). Includes the Gran Sport (A9) option, the 1971–73 boattail, and the 1979–82 S Type / T Type turbos.

    Code systems: 1960s Rivieras show Fisher Body accessory group codes on the body plate, Buick dealer ordering codes (A8, A9, H2, …) in sales literature, and corporate RPO codes on build records. See division README.

    Years 1963–1965 {#year-1963}

    Code Description Years Models/Notes Confidence
    Y48 Super Wildcat 425 cid dual 4-bbl V8, 360 hp (corporate RPO) 1964 Riviera single-source
    A8 Super Wildcat 425 dual-quad engine option (dealer code); 454 sold without GS package in 1965 1965 Riviera confirmed
    A9 Gran Sport option, $306.38: 360 hp Super Wildcat dual 4-bbl (engine code LX, chromed twin-snorkel air cleaner, finned aluminum valve covers), modified exhaust & TH-400, posi w/ 3.42 axle, ornamentation, wheel covers 1965 Riviera; 3,354 built confirmed
    H2 Ride and Handling package: quicker steering, firmer suspension 1965 Riviera; extra-cost companion to A9 confirmed

    Fisher Body accessory codes (body-plate groups, 1963–65, per ROA — partial list, meanings abbreviated): Group 1 letters E, W, X, N, G, F, T, Y, R, S, M, U, D, K (power windows, seats, locks, trunk release); Group 2 2A–2R (upholstery, paint, heater delete, A/C, transmission, lighting, speakers); Group 3 3E, 3W, 3B, 3S, 3V (crash pad); Group 4 4F (remote mirror); Group 5 5Z, 5W, 5K (seat belts, door moldings). Confidence: single-source (ROA).

    Dealer-installed accessories (1963–65, ROA): Superlift shocks, cornering lights, Twilight Sentinel, dash tachometer (1964–65, $55), rear-window defroster, remote mirror, trunk release, compass, reverberator (1965).

    Years 1966–1970 {#year-1966}

    Code Description Years Models/Notes Confidence
    A9 Riviera GS option (dealer ordering code): performance axle/posi, ride-and-handling chassis, ornamentation; 1970 listing verbatim "Riviera GS Option" 1966–1970 Riviera; verified on 1970 factory full-size sheet; 1965 usage confirms continuity confirmed
    A7 / A8 High-performance engine / engine group codes on full-size sheet 1970 Shared with full-size line — see fullsize.md confirmed
    B2 Turbo Hydra-Matic 400 1970 Riviera (std/required) confirmed
    C1 / C6 / C7 Power disc brakes / steering / brakes 1970 Riviera confirmed
    H2 / H3 Ride & handling / automatic level control 1970 Riviera & full-size confirmed
    I-5 Automatic Climate Control A/C 1970 Riviera & full-size confirmed
    K2 Cornering lights 1970 Riviera & full-size confirmed
    M9 Heated-glass rear window defroster 1970 Riviera confirmed
    S6 / S7 Cruise Master / tilt wheel 1970 Riviera confirmed
    X3 Rim-blower steering wheel 1970 Riviera confirmed

    The remaining 1970 letter-codes (D-radio, F-tire, G-axle, J-belt, L-glass, O/P/Q/R/T/U/V/W appearance & convenience) are shared with the full-size sheet — full table in fullsize.md.

    Years 1971–1973 — boattail {#year-1971}

    Code Description Years Models/Notes Confidence
    — (GS option) Riviera GS: specially calibrated TH-400, HD suspension, posi, chrome air-cleaner top, H78x15 tires, GS fender monograms; $200 in 1972 (455 4-bbl, 330 hp gross-'71/net-'72 ratings differ) 1971–1973 Boattail Riviera confirmed
    KF2 Wheel Spin Control (corporate RPO) — believed to be the Max Trac electronic traction control option 1971–1974 Riviera (Max Trac offered 1971–72 per parts sources; RPO-to-name mapping single-source) single-source
    G80 Positive traction differential (RPO) 1971–1976 Riviera confirmed
    C61 Automatic climate control A/C (RPO) 1971–1976 Riviera single-source
    N37 Tilt & telescoping steering column (RPO) 1971–1976 Riviera single-source
    G67 Rear air-lift shocks, automatic level control (RPO) 1971–1976 Riviera single-source
    U35 / U63 Electric clock / AM radio (RPO) 1970–1976 Riviera single-source

    1973 was the last year for the GS handling/performance option on the boattail; the 455 Stage 1 was not offered on the Riviera (no source found claiming a factory Riviera Stage 1) — treat any such claim as unverified.

    Years 1974–1978 {#year-1974}

    Notchback restyle 1974–76 (455 std.), downsized B-body 1977–78 (350/403). No Riviera-specific option code tables located online — coverage gap. Applicable corporate RPOs from the 1970–76 Buick list: L72 (455 2-bbl, full-size usage), C61, G80, N37, AT8 (50/50 reclining passenger seat), CF5 (Astroroof, electric). Confidence: single-source.

    Years 1979–1982 — E-body FWD {#year-1979}

    Code Description Years Models/Notes Confidence
    — (S Type) Riviera S Type: 3.8L V6 turbo (4-bbl, ~185 hp in '79–'80 E-body tune), Gran Touring-style suspension, blackout trim 1979–1981 Riviera; Motor Trend 1979 Car of the Year context confirmed (model)
    LC8 3.8L V6 turbocharged 4-bbl (corporate RPO as used on carbureted turbo Buicks) 1979–1982 Riviera S Type / T Type; RPO attribution to Riviera single-source single-source
    — (T Type) T Type replaced S Type designation 1982 Riviera confirmed (model)

    Detailed 1979–82 Riviera RPO tables (window-sticker level) were not located — coverage gap; the ROA production/statistics pages document totals but not per-code lists.

    Sources