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

Engine Code	WH
Displacement	400 CID
Bore x Stroke	4.1212" x 3.750"
Compression Ratio	10.5:1
Horsepower @ RPM	370@5500
Torque (Lb/Ft) @ RPM	445@3900
Head Casting	614
Carburetor	4-bbl
Carburetor - Federal	7040273
Carburetor - Calif	7040573
Intake Manifold	9799084
Camshaft	9794041
Part #	9794041
Lift, I/E	.527 / .527
Rocker Arm Ratio	1.65:1
Duration I/E - Degrees	308 / 320
Overlap - Degrees	87
Intake Valve Dia -	2.11"
Exhaust Valve - Dia	1.77"
Exhaust Manifolds	R 9799721
Exhaust Manifolds	L 478141
Distributor	1112013

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

Engine Code	XN
Displacement	400 CID
Bore x Stroke	4.1212" x 3.750"
Compression Ratio	10.5:1
Horsepower @ RPM	370@5500
Torque (Lb/Ft) @ RPM	445@3900
Head Casting	614
Carburetor	4-bbl
Carburetor - Federal	7040270
Carburetor - Calif	7040570
Intake Manifold	9799084
Camshaft	9779068
Part #	9779068
Lift, I/E	.527 / .527
Rocker Arm Ratio	1.65:1
Duration I/E - Degrees	308 / 320
Overlap - Degrees	87
Intake Valve Dia -	2.11"
Exhaust Valve - Dia	1.77"
Exhaust Manifolds	R 9799721
Exhaust Manifolds	L 478141
Distributor	1112013