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Strip Specs | Year/Model | '68 Firebird | | Race Weight with driver | 3,615 lbs | | Curb Weight | 3,430 lbs | | Fuel Level when last weighed | Full | | Fuel | Premium pump gas, 91-octane | | Engine | 428, 1969 (date code A279), XF | | Cubic Inches Before/After | 428/462 | | Engine Built By | Pacific Performance Racing about seven years ago | | Power Adder | None | | Induction System | | Air Cleaner | K&N | | Carburetor | Holley 780 | | Jets, Primary/Secondary | #78/88 | | Spacer Plate | None | | Intake Manifold | Performer RPM | | Fuel System | | Pump | Mallory 140 electric | | Lines | 8 AN stainless covered hose | | Regulator | Mallory, set to 6 psi | | Heads | | Casting | 1967 #670 | | Porting | Pacific Performance Racing | | Flow Numbers | Unknown | | Valves | Stainless, Ferrea, 2.11/1.77-in | | Bottom End | | Pistons | Ross, forged, 20 cc dish, +0.060 | | Rings | Federal Mogul, moly | | Rods | Eagle forged steel, 6.625-in | | Compression Ratio | 9.6:1 | | Crankshaft | Eagle cast steel, 4.21-in stroke | | Rotating Assembly Balanced | Yes | | Camshaft | | Brand | CompCam solid | | Duration at 0.050 | 248/248-deg | | Duration Advertised | 294/294-deg | | Lift with Specified Rocker Arms | 0.525/0.525-in | | Lobe Separation Angle | 110-deg | | Installed Position | Straight up | | Rocker Arms | CompCams Magnum, roller 1.65:1 | | Ignition | | Distributor | MSD with magnetic pickup | | Amplifier | MSD Digital 6 | | Coil | MSD Blaster 2 | | Wires | MSD 8mm spiral wound | | Spark Plugs | AC45S | | Total Timing | 34-deg at 2,600 rpm | | Exhaust | | Headers | Hedman | | Primaries | 1.875-in | | Collectors | 3-in | | Exhaust Pipes | 3-in cutouts after collectors and then | | | reduced to 2.5-in | | Mufflers | Flowmaster 40s | | Crossover | 2.5-in H-pipe |
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