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Stian's

1973 Pontiac Firebird

Formula 455/7.5L V8

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Build Points

123

  • Color: Cherry black mica
  • Drivetrain: RWD
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  • Vehicle Overview

    Originally a 400 car, now with a 455 bored 0.60 over (469) with speedpro forged pistons. Edelbrock D-ports with 2.11 intake 1.77 exhaust ported to 310+ cfm -Billet double roller timingset 9-way adjustable. With Nigthmare pro hardend cam plate (with oiling groove) Comp cam custom Grind roller cam 230/236 @0.50 112 LSA -Johnson short travel hyrdaulic roller lifters -Tomahawk single plane intake, portmatched to heads. -TH400 (from 71 caddliac) -Scorpion 1.5 roller rockers, -Smith brothers chrome moly .116 wall, Length 9.150, restricted .030 - Holley Sniper 4150 black efi - hyperfuel gastank with in-tank pump - Yukon duragrip 8.5" diff with master install kit, reused 3.42 gearset - Partial speedhut instruments. - Powerbond SFI harmonic balancer with ARP Bolt and SFI flexplate from prw with ARP fastners and green loctite (permanent this time!) - Hypers spark CD box . Hyperspark distributor -Pypes SGF-11 2.5" dual exhaust with x-over - Headman headers 1 3/4" primary. -Aluminium subframebushings (4x)

    Completed Modifications

    Engine Management (ECU) (2)
    Fuel System (2)

    Future Plans

    TO: - 2x steel upper coresupport bushings. - Speedhut speedometer with electric signal adapter to TH400 (and somehow integrate speedsensor into holley sniper for datalogging) -Repop Ramair aircleaner assembly and rubber boots to connect to hood scoops - A decent set headers with coating and a thick flange ++++++ alot more, will never be 100% done

    Wishlist: 1973 Firebird Formula 455

    Removed Modifications

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    Comments

    • Henry

      02/27/2020
      Very nice, i had a 73 400. Love the pontiacs. Wish i still had mine.
      Show 1 Reply
    • Tony

      01/01/2021
      Love it! Nice looking ride
      Show 1 Reply