LS-Powered 1967 Pontiac Firebird 400 Coupe Six-Speed

Description

The 1967 Pontiac Firebird marked Pontiac’s bold entry into the pony car segment, directly challenging the Ford Mustang and Chevrolet Camaro. Introduced mid-year in February 1967, the Firebird shared its F-body platform with the Camaro but featured distinct Pontiac styling and performance options. 

The Firebird 400 was the top-tier performance model in the lineup, equipped with Pontiac’s 400 cubic-inch V8 engine borrowed from the GTO that produced 325 horsepower. A special Ram Air version was also available, and buyers could choose from a variety of manual and automatic transmissions. Stylistically, the Firebird 400 stood out with its dual-scoop hood, unique front-end design with a split grille, and “400” badging. It came standard with heavy-duty suspension, front disc brakes, and a limited-slip differential, making it more than just a straight-line bruiser. Inside, the Firebird featured bucket seats, a floor-mounted shifter, and optional Rally gauges.  

This 1967 Pontiac Firebird 400 is even more than it appears to be, as it has been fully restored and has received multiple upgrades, including an engine swap. It is now powered by a 5.3-liter V8 out of a 2019 GMC Yukon, has a TR-6060 Magnum six-speed manual transmission, and was repainted two months ago. 

Highlights 

• Restoration/upgrades under current ownership: 

  • Fresh Tyrol Blue paint in March 2025

  • Replaced original engine with an L84 5.3-liter V8 out of a 2019 GMC Yukon rated at 355 hp and 383 lb-ft of torque 

  • New PSI conversion wiring kit 

  • 2018 Chevrolet Camaro SS engine control unit 

  • Replaced original transmission with TR-6060 Magnum six-speed manual transmission with about 1,500 miles on it 

  • McLeod 11-inch Super Street Pro clutch 

  • Quick Time blowproof bellhousing 

  • Custom LSX flywheel 

  • Custom driveshaft 

  • Flowmaster exhaust with cutouts 

  • 10-bolt rear end from a Chevrolet S-10 Blazer ZR2 with 3.73:1 gear ratio and disc brakes 

  • New 4-link suspension with QA1 coil overs in the rear and new springs, shocks, upper and lower tubular control arms up front 

  • New brake rotors, calipers, and pads front and rear 

  • New brake booster and slave 

  • New metal floor pan 

  • New steering gear box 

  • Reupholstered cream-colored seats in front and rear 

  • New seat tracks 

  • New door hinges 

  • New door cards 

  • New seals around door and windows and door/window handles 

  • New carpet 

  • New Bosch gauges (retro fit) 

  • Center console from a Camaro ZL1 

  • New headliner 

  • New taillight pig tails with LED bulbs 

Features 

• The chassis number (223377U126076) decodes as: 

  • 2 – Pontiac 

  • 23 – Firebird 

  • 37 – Hardtop sport coupe 

  • 7 – 1967 model year 

  • U – Lordstown, Ohio, assembly plant 

  • 126076 – Sequential production number  

• Chrome air cleaner, rocker covers, and oil cap 

• Dual hood scoops with 400 lettering 

• Dual exhaust 

• 160 mph speedometer 

• Quarters affixed to interior knobs 

• Rally II wheels 

• New SureDrive 195/65R15 front tires, Cooper Cobra Radial G/T 275/60R15 rear tires 

Known Imperfections 

• Paint chipped on some corners  

• No radio/hole in dashboard 

• No wipers 

Included 

• Two sets of keys

• Receipts 

• Touch-up paint 

Ownership History 

The Nevada seller of this 1967 Pontiac Firebird 400 has owned it since January 2024 and immediately went to work on numerous upgrades. It has been well maintained and garage kept.