By the Numbers
'75 Pontiac Trans Am
Chris Williams * Sleepy Hollow, IL
Vehicle weight w/driver: 3,823 pounds
Best ET: 11.52/117 * Total cost to build: $22,175
Engine
Type: Pontiac 400 displacing 460 cubic inches (4.150 bore x 4.250 stroke)
Block: 1972 vintage
Compression ratio: 10.33:1
Oiling: Milodon 7-quart oil pan, crankshaft scraper
Rotating assembly: 4.250-inch stroke Ohio Crankshaft crank, Eagle BBC H-beam rods, Ross race flat-top pistons
Cylinder heads: Edelbrock Performer, 87cc combustion chambers
Camshaft: Bullet Racing Cams solid lifter flat tappet (256/258 deg. @ .050; .618 lift @ 6,000 rpm)
Valvetrain: 2.11/1.66-inch valves, 1.65:1 COMP roller rocker arms, COMP pushrods, Crane dual valve springs with dampers
Induction: Edelbrock Torker 2 intake, Holley HP950 carburetor
Power adder: None
Ignition: MSD Pro Billet distributor, 6AL box
Exhaust: Hedman headers, 1 7/8 primary pipes, 3.5-inch collectors, X-pipe, 3-inch Flowmaster mufflers
Fasteners: ARP 12-point throughout
Built By: Rick Sliwinsky, Precision Engine and Machine, Sleepy Hollow, IL
Drivetrain
Transmission: 1975 BOP Turbo 350 (built by Dean at DRC Racing Transmissions, Elk Grove Village, IL)
Valve body: manual
Converter: ATD 9-inch, 4,800 rpm stall speed
Cooler: B&M
Shifter: Hurst Quarter Stick
Driveshaft: Custom Strange Engineering chrome moly, 4340 1350-series yokes
Rear axle: Chevrolet 12-bolt housing, Eaton limited-slip differential, 4.33:1 ring-and-pinion
Chassis
Front suspension: factory spindles, Hotchkis 2-inch lowering springs, Energy Suspension bushings, Moog HD ball joints, Monroe shock absorbers (street), or Moroso (drag race), Hotchkis 1.375-inch antisway bar
Rear suspension: Hotchkis 1.5-inch drop leaf springs, Monroe/Moroso shock absorbers, Hotchkis 7/8-inch antisway bar
Brakes: stock disc, braided lines, front; stock drums, rear
Wheels & Tires
Wheels: Cragar race 15x8, front; 15x10, rear
Tires: BFG 215/65x15, front; M/T ET Street 28x12.50x15, rear