Elite Dealer

1966 Pontiac GTO

Addison, Illinois

$79,995

Video

Vehicle Details

Make

Pontiac

Model

GTO

Year

1966

Body Type

Convertible

Exterior Color

Black

Transmission

Automatic

Drivetrain

RWD

Fuel Type

Gasoline

Engine

compartment Upgraded Aluminum radiator & cooling fan Automatic TH400

Condition

Good

Description

1966 Pontiac GTO Convertible (CHECK OUT 10 MINUTE VIDEO) Rebuilt YS 389/360hp Factory V8 engine Tri Power set up 3x2bbl Nice and clean engine compartment Upgraded Aluminum radiator & cooling fan Automatic TH400 transmission New Power steering/ New Power disc brakes Factory correct wheels & Red line Tires True Dual exhaust-sounds great Real sharp Black exterior Power convertible vinly top Inner/Outer door jams nice Suspension feels great Factory posi unit Factory stamped (3495N) posi rear end Factory 3:55 gear ratio Rear multi leaf springs & shocks Front Stock A arms & springs Chrome/trim all good Weatherstripping/glass all good Underneath is very Clean Trunk is solid with mat & spare tire Newer gas tank installed Factory appearance Nice interior Factory bucket seats Factory center console/shifter Upgraded triple gauge package Upgraded Stereo & speakers with AUX Factory metal 1/4's are stamped GM Fresh oil change & serviced Clean title & ready to go! TRADE-INS WELCOME! IF YOU can dream it… YOU can do it!! Check out my Video Clip!!! Suggested Retail Appraised value $87,400.00 MGM Buy it Now price $79,995.00 Financing available $8000 down payment Must have good credit Sales tax/delivery can be financed Apply today on our website Text zip code for delivery quote 847-848-1850 All cars are sold in as-is condition Shown by appointment only! WE HAVE OVER 180 CARS IN STOCK! WE OWN OUR INVENTORY! NO CONSIGNMENTS NO INFLATED COMMISSIONS! BUY WITH CONFIDENCE 100% CUSTOMER FEEDBACK OVER 500 (5) STAR REVIEWS! OVER 180 vehicles in STOCK! MGM Classic Cars LLC 150 S. Church Street Addison, IL 60101 Mon-Fri 9 am-5 pm Sat 10 am-3 pm Visit our website Mgmclassiccars.com
Trim: 389cid 3x2bbl TRI POWER CONVERTIBLE AUTO REDLINES
Body Style: 3
Fuel Type: Gasoline

Classic Pontiac GTO Buyer's Guide

Full guide

Mike Sullivan

Muscle Cars

1964–1974

~5 min read

Updated Apr 2026

Definitive buyer's guide for classic Pontiac GTO 1964-1974. PHS Documentation essentials, Ram Air engine identification, frame inspection, and current market pricing for Tri-Power and Judge cars.

This guide covers

✓ 10-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 5 FAQs answered

✓ History & fun facts

Read the Full GTO Buyer's Guide

Pontiac GTO Market Overview

Based on 59 Pontiac GTO listings currently on ClassicCarsArena.com

Listed Now

$58,394

Avg. Asking Price

1955–1971

Year Range

Price Position on Our Site — Above Average

This car: $79,995

Low: $6,495 High: $139,995

Transmission Distribution

Automatic 47% ◄

Manual 39%

Condition Distribution

Excellent 12%

Good 14% ◄

Fair 3%

Poor 2%

Data from ClassicCarsArena.com listings Browse all 59 listings →

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What is this car worth?

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Classic Pontiac GTO Buyer's Guide

The 1964 Pontiac GTO is the car most historians credit with creating the muscle-car era — a mid-size Tempest with a 389 V8 stuffed under the hood, sold to a generation of young buyers who wanted big-car power in an intermediate-car body. For ten model years (1964-1974) the GTO defined American performance, and today the documented original Tri-Power and Ram Air cars represent the most concentrated value in the entire muscle-car market. This guide covers what separates the legitimate GTOs from the LeMans clones, and what every buyer should verify before wiring money.

What to Check Before Buying

✓

Order PHS Documentation Report ($50-$80) — Pontiac Historic Services. Confirms original engine, trans, axle, options, paint. Mandatory for any premium-trim claim.

✓

Verify GTO option code on cowl tag — 1964-1967: code 242. 1968-1974: GTO body code in dataplate. Cross-reference with VIN and PHS report.

✓

Read engine casting numbers and stamping — Casting on back of block; two-letter code stamped on front pad below cylinder head. Cross-reference with PHS.

✓

Inspect frame at rear body mount points — Body mount bushings collapse and water pools above. Frame rust here = $1,500-$3,500 repair minimum.

✓

Probe perimeter frame at front kick-up — Behind front wheels. Solid steel resists; rotten metal flakes. Common rust point on salt-belt cars.

✓

Check trunk drop-offs and rear quarters — Magnet test for filler. Lift trunk mat to inspect drop-offs and rear pan.

✓

Verify Hood Tach functionality (1969-1972) — Optional Hood Tach commonly fails. Reproduction units don't always read accurately. Cosmetic concern.

✓

Test all electrical and vacuum-actuated headlights — Hidden headlights (1968-1969) commonly fail. Cracked vacuum lines drop lights at speed.

✓

Compression test all eight cylinders — Should read 145-185 PSI uniformly. Variance >15% between cylinders = head gasket or ring problem.

✓

Drive at least 30 minutes on highway — Listen for differential whine, transmission slip, brake pulsation, steering wander. Watch for overheating.

Common Issues

GTO rust follows the GM A-body pattern: lower rear quarters, trunk drop-offs, frame rails (especially under the rear seat where the body mounts to the frame), floor pans, cowl seam, and lower fenders ahead of the doors. The 1964-1967 cars (perimeter frame) hide rust in boxed sections of the frame; the 1968-1972 cars (also perimeter frame) add rust at the rear frame kick-up where the body mount bushings collapse and water pools. Mechanically, the Pontiac V8 family (326, 389, 400, 421, 428, 455) is bulletproof when maintained but suffers from oil leaks at the timing cover, valve covers, and rear main seal. The Muncie M20/M21/M22 four-speeds are robust; the Turbo 350 and Turbo 400 automatics are equally durable. The Pontiac 8.2-inch and 10-bolt rear ends are weaker than the Ford 9-inch — broken stub axles are a known issue on hard-launched cars. Electrical issues are the universal classic-car concerns plus one Pontiac-specific issue: the Hood Tach (1969-1972 optional) commonly fails or is no longer functional. Replacement units are reproduction-only and don't always read accurately. Vacuum-operated headlights on the 1968-1969 GTO models commonly fail — the rubber vacuum lines crack at 50+ years old, and the headlights drop at speed.

What to Look For

PHS Documentation is the gold-standard verification for any GTO claimed as Tri-Power, Ram Air, Judge, or HO. Pontiac Historic Services (PHS) sells $50-$80 reports based on Pontiac's original production records — the report tells you exactly what equipment the car was originally ordered with, when it was built, where it was shipped, and what dealer received it. No competent GTO collector buys a premium-trim car without PHS documentation. For the 1964-1967 cars, verify the GTO option code on the dataplate (cowl tag riveted to the firewall under the hood). The 1965-1967 cars use codes 242 (GTO option on Tempest) — pre-1968 GTOs were technically Tempest LeMans models with the GTO option. The 1968-1974 cars are stand-alone GTO models with their own VIN prefix. Engine identification by casting numbers and stamping is essential. The 389 (1964-1966), 400 (1967-1970, 1972-1974), 421/428 (rare), and 455 (1970-1973) all have distinct casting numbers. The Ram Air III (codes WT/YS), Ram Air IV (codes WW/YZ), and HO 455 cars (code WX, 1971-1972) carry significant premiums when documented original. Frame inspection is the second non-negotiable. Crawl under the car with a flashlight. Probe the frame rails at the rear body mount points and at the kick-up behind the front wheels. The body mount bushings are commonly collapsed on 50+ year-old cars, and the frame above the bushings rusts from water pooling. Replacement is $2,000-$5,000 per side if needed.

Price Guide

1964 GTO Tri-Power cars (the original year) trade for $55,000-$110,000 depending on body style and condition. Convertibles command 25-35% premium over equivalent hardtops. 1965-1966 Tri-Power cars are similar money: $50,000-$95,000 for documented drivers, $110,000-$180,000 for concours-grade restorations. The 1969 Judge package (introduced mid-year as the cheap-and-loud counter to the Plymouth Road Runner) is the most desirable single GTO variant. Documented Judge cars with the Ram Air III or Ram Air IV engine run $80,000-$220,000 depending on body style and equipment. The 1971 Judge convertible (only 17 built with the 455 HO) is $300,000-$500,000+ territory at auction. Driver-quality 1968-1970 GTOs with the 400 and the four-speed run $45,000-$75,000 today. The 1971-1972 cars (455 HO era, before federal emissions de-tuning) are bargain entry points at $35,000-$60,000 for solid drivers. The 1974 final-year cars (Ventura-based, with the 350 V8) are the value play — clean drivers run $22,000-$38,000. Project cars (running but rough) start around $15,000-$25,000 for 1968-1972 cars. Stripped roller candidates are $8,000-$15,000 — but rust restoration on a perimeter-frame A-body runs $25,000-$50,000 in body and frame work alone.

Did You Know?

John DeLorean and his team developed the GTO in 1963 by dropping a 389 V8 into a Tempest body, in deliberate violation of GM's corporate policy banning intermediate cars from carrying engines larger than 330 cubic inches. DeLorean's team made the GTO a Tempest "option package" (code 242) rather than a stand-alone model to slip past GM's policy review committee. The car was approved before management caught on, and once it became a sales hit (32,450 units in 1964), GM was forced to lift the engine-size ban — opening the floodgates for Chevelle SS, Buick GS, and Olds 442. The GTO name was borrowed from the Ferrari 250 GTO, much to Enzo Ferrari's reported displeasure. "GTO" stands for Gran Turismo Omologato — a homologation classification for cars eligible to compete in FIA grand-touring racing. Pontiac never raced the GTO in FIA events. The 1969 Judge package was originally conceived as a low-trim, hardcore-performance counter to the Plymouth Road Runner — it was supposed to be the cheap, no-frills version of the GTO. By 1971, the Judge had become the high-trim flagship of the GTO line, with bigger engines, more interior options, and significantly higher pricing.

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Elite Dealer

$79,995

1966 Pontiac GTO

Addison, Illinois

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Original Factory Colors

Official paint codes for the Pontiac GTO (1966).

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Model History