BY THE NUMBERS
70 PONTIAC FIREBIRD ESPRIT
Brett Evans • Glen Carbon, IL
Vehicle weight w/driver: 4,100 pounds
ENGINE
Type: Pontiac displacing 541 cubic inches
(4.375 bore x 4.500 stroke)
Block: 2007 cast-iron IA II AllPontiac.com
Compression ratio: 10.5:1
Oiling: Canton 6-quart road race pan, Wix filter
Rotating assembly: 4.50-inch stroke
AllPontiac.com 4340 crank,
6.70-inch GRP aluminum rods,
Ross pistons, Total Seal ring packs
Cylinder heads: Butler Performance/Edelbrock
Wide Ports, CNC-machined,
370-cfm intake port,
268-cfm exhaust port at .700-inch lift
Camshaft: COMP solid roller
(270 degrees at .050; .735-inch lift)
Valvetrain: 2.19/1.77-inch Ferrea
stainless steel valves,
1.6:1 T&D shaft rocker arms,
Butler Performance pushrods,
COMP valvesprings, titanium retainers
Induction: Edelbrock Victor Jr. intake,
Holley HP 1250 carburetor
Power adder: NOS Fogger Pro Race,
Big-Shot plate
Ignition: MSD Pro-Billet distributor,
digital programmable 7AL box,
34 degrees timing
Exhaust: Hooker Super Comp headers,
2-inch primary pipes,
3.5-inch collectors,
3.5-inch full-length exhaust pipes,
Spin Tech mufflers
Fasteners: ARP
Built by: Butler Performance, Leoma, TN
DRIVETRAIN
Transmission: Turbo 400, reverse shift pattern
manual valvebody,
TCI 10-inch torque converter,
3,400-rpm stall speed,
B&M fluid cooler, TCI Outlaw shifter
Driveshaft: Coan custom-built 3-inch
chrome-moly steel,
4340 1350-series yokes,
Gear Vendors under/overdrive
Rear axle: sheetmetal 9-inch housing,
58 inches flange to flange,
Moser center section,
Detroit Locker limited-slip differential,
3.50:1 ring-and-pinion, 35-spline axles,
5/8-inch wheel studs
CHASSIS
Front suspension: QA1 coilover 450-lb/in springs
and adjustable shock absorbers,
stock spindles, Global West tubular
upper and lower control arms,
Addco 1 1/4-inch antisway bar
Rear suspension: CalTracs bars
and split monoleaf springs,
Afco front mounts and rear slider mounts,
custom-built Watt’s link, QA1 shock absorbers
Brakes: Baer 13-inch disc, front;
12-inch disc, rear
WHEELS & TIRES
Wheels: Complete Custom Wheels (CCW),
18x9.5, front; 18x12, rear
Tires: Toyo RA1 275/35ZR18, front;
335/30ZR18, rear