Owner Bio:John Labuda
John Labuda, a 61-year-old lawn and garden shop owner, says he bought his GTO new back in 1970. It's been used to haul a boat, a camper trailer, groceries, and take his kids to kindergarten. He's raced since the '60s, and says he enjoys driving his GTO every time he gets into it. It's currently his only Pontiac.
| Strip Tuning Log |
| Run/Tuning | Launch RPM | Shift Pt. | 60-ft. | 1/8-mile | 1/4-mile |
| 1. 40-deg timing, tire press. 16 psi, jets No. 84 | 1,000 | 6,000 | 1.48 | 6.69/101.29 | 10.60/124.65 |
| 2. Tire press. 15 psi | 1,000 | 6,000 | 1.46 | 6.69/101.26 | 10.60/124.52 |
| 3. Jets No. 84 | 1,000 | 6,000 | 1.44 | 6.69/101.11 | 10.60/124.52 |
| Best Pass Corrected | | 10.39/126.99 |
| 4. Jets No. 82 | 1,000 | 6,000 | 1.44 | 6.70/100.71 | 10.62/124.48 |
| 5. Same | 1,000 | 6,000 | 1.45 | 6.73/100.49 | 10.66/123.84 |
Run Notes:
Good traction, smooth run; 2) Good traction, solid run; 3) Good traction, ran hard; 4) Good traction, smooth run; 5) Stumble off line.
| Strip Specs |
| Year/Model | '70 GTO |
| Race Weight with Driver | 3,580 lbs |
| Curb Weight | 3,365 lbs |
| Fuel Level When Weighed | Full |
| Fuel | 112-octane |
| Engine | '74 Y4-code 455 |
| Cubic Inches Before/After | 455/469 |
| Engine Built By | The owner |
| Power Adder | None |
| Induction System |
| Air Cleaner | K&N |
| Carburetor | Holley, 800-cfm |
| Jets | No. 86 square |
| Spacer Plate | 1-in wood, open |
| Intake Manifold | Edelbrock Torker II, port-matched |
| Fuel System |
| Pump | Holley Black, 140-gph |
| Lines | 1/2-in |
| Regulator | Holley, set at 8.5 psi |
| Heads |
| Casting | Edelbrock, 72 cc |
| Head Porting | Jim Butler |
| Flow Numbers | 320-cfm at 0.700-in lift at 28-in of pressure |
| Valves | 2.11/1.77-in Ferrea stainless steel |
| Bottom End |
| Pistons | Ross forged, 0.060-over |
| Rings | Total Seal, 1/16-, 1/16-, 3/16-in |
| Rods | Eagle forged steel, 6.625-in length |
| Compression Ratio | 11.5:1 |
| Crankshaft | Pontiac "N" 4.210 stroke |
| Rotating Assembly Balanced | Yes |
| Camshaft |
| Brand | Comp Cams, solid roller |
| Duration at 0.050 | 272/276-deg |
| Duration Advertised | 304/308-deg |
| Lift with Specified Rocker Arms | 0.609/0.609-in |
| Lobe Separation Angle | 108-deg |
| Installed Position | 104-deg |
| Rocker Arms | Scorpion rollers 1.65:1/1.5:1 |
| Ignition |
| Distributor | MSD Pro-Billet |
| Amplifier | MSD 6AL + start/retard control |
| Coil | MSD Blaster |
| Wires | MSD 8.5mm |
| Spark Plugs | Autolite 3924 |
| Total Timing | 40-deg |
| Rpm That Total Timing Is Reached | 2,000 |
| Exhaust |
| Headers | Hooker Super Comp |
| Primaries | 2.00-in |
| Collectors | 3.50-in |
| Exhaust Pipes | 3.50-in |
| Mufflers | Dynaflow |
| Crossover | None |
| Drivetrain |
| Transmission | Turbo 400 |
| Converter | 8-in ATI, 4,000-rpm stall |
| Shifter | Hurst Quarter Stick |
| Rear | GM 12-bolt |
| Rear Gear Ratio | 4.10:1 |
| Spool | Moser |
| Axles | Moser, 30-spline |
| Chassis and Suspension |
| Brakes F/R | Disc/Drum |
| Wheels F/R | Centerline Auto Drag 15x3.5/15x10 |
| Tires F/R | Hoosier 28x4.5x15 / 30x10.5x15 |
| Tire Pressure F/R | 40 psi/13 psi |
| Suspension Front |
| Springs | NAPA LeMans six-cylinder springs |
| Control Arms | Stock |
| Stabilizer Bar | None |
| Shocks | Summit 90-10 |
| Suspension Rear |
| Springs | Stock |
| Shocks | NAPA, gas-charged |
| Stabilizer Bar | Stock, 0.875-in |
| Other Features | Lakewood traction bars |
| Chassis Mods | 8-point S&W rollbar |
| The Rest |
| Interior Mods | Poly race seats with covers/rear seat removed |
| Exterior Mods | Fiberglass hood and front bumper |
| Safety Mods | SFI-approved drivetrain parts, cut-off switch, |
| blanket-on transmission, driveshaft safety loop |
| Color | Cardinal Red |
| Launch Technique | Idle, lift left foot, push right foot |
| Best 1/8-mile E.T./MPH Prior to Event | 6.537/103.59 |
| Best 1/4-mile E.T./MPH Prior to Event | 10.34/128.21 |