1972 Pontiac Firebird Trans Am 455 CID
Manual Transmission Engine Specifications

Engine Code	WL, WC
Engine RPO	LS5
Displacement	455 CID
Bore x Stroke	4.1522" x 4.121"
Compression Ratio	8.4:1
Horsepower @ RPM	300@4000
Torque (Lb/Ft) @ RPM	4150@3200
Head Casting	7F6
Carburetor	4-bbl
Carburetor - Federal	7042273
Intake Manifold	488945
Camshaft
Part #
Lift, I/E	.408 / .406
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"
Distributor

1972 Pontiac Firebird Trans Am 455 CID
Automatic Transmission Engine Specifications

Engine Code	YE, YA
Engine RPO	LS5
Displacement	455 CID
Bore x Stroke	4.1522" x 4.121"
Compression Ratio	8.4:1
Horsepower @ RPM	300@4000
Torque (Lb/Ft) @ RPM	415@3200
Head Casting	7F6
Carburetor	4-bbl
Carburetor - Federal	7042270
Intake Manifold	488945
Camshaft
Part #	9779068
Lift, I/E	.408 / .406
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"
Distributor