1970 Pontiac Firebird Trans Am 400 CID Ram Air III
Manual Transmission Engine Specifications

Engine Code	WS
Displacement	400 CID
Bore x Stroke	4.1212" x 3.750"
Compression Ratio	10.5:1
Horsepower @ RPM	345@5000
Torque (Lb/Ft) @ RPM	430@3400
Head Casting	12
Carburetor	4-bbl
Carburetor - Federal	7040273
Carburetor - Calif	7040573
Intake Manifold	9799068
Camshaft
Part #	9779068
Lift, I/E	.410 / .413
Rocker Arm Ratio	1.5:1
Duration I/E - Degrees	288 / 302
Overlap - Degrees	63
Intake Valve Dia -	2.11"
Exhaust Valve - Dia	1.77"
Exhaust Manifolds	R 9799720
Exhaust Manifolds	L 478140
Distributor	1112024

1970 Pontiac Firebird Trans Am 400 CID Ram Air III
Automatic Transmission Engine Specifications

Engine Code	YZ
Displacement	400 CID
Bore x Stroke	4.1212" x 3.750"
Compression Ratio	10.5:1
Horsepower @ RPM	345@5000
Torque (Lb/Ft) @ RPM	430@3400
Head Casting	12, 13
Carburetor	4-bbl
Carburetor - Federal	7040270
Carburetor - Calif	7040570
Intake Manifold	9799068
Camshaft
Part #	9779068
Lift, I/E	.410 / .413
Rocker Arm Ratio	1.5:1
Duration I/E - Degrees	288 / 302
Overlap - Degrees	63
Intake Valve Dia -	2.11"
Exhaust Valve - Dia	1.77"
Exhaust Manifolds	R 9799720
Exhaust Manifolds	L 478140
Distributor	1112009