1971 Firebird Engines

										Engine ID Stamping
UPC Code	Type	Source	Displacement (cubic Inches)	Bore & Stroke	Carb	Comp	HP/RPM	Torque/RPM	VIN	Manual	Automatic	Usage
L-22	Inline 6	Chevrolet	250	3.875 x 3.531	1 bbl	8.5:1	155@4200	235@1600	n/a	CAA	CAB	standard Base
L30	V-8	Pontiac	350	3.875 x 3.75	2 bbl	8.2:1	255@4600	355@2800	n/a	WR, WU, XR, YU		standard Esprit and Formula 350, optional Base
L65	V-8	Pontiac	400	4.125 x 3.75	2 bbl	8.2:1	265@4400	400@2400	n/a	-	XX	optional Esprit
L78	V-8	Pontiac	400	4.125 x 3.75	4 bbl	8.2:1	300@4800	400@3600	n/a	WK, WT, YS		standard Formula 400
L75	V-8	Pontiac	455	4.15 x 4.21	4 bbl	8.2:1	325@4400	455@3200	n/a	-	YZ	standard Formula 455
LS5	V-8	Pontiac	455 HO	4.15 x 4.21	4 bbl	8.4:1	335@4800	480@3600	n/a	YE	WC, WL	optional Formula 455, standard Trans Am