1970 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	3.88 x 3.53	1 bbl	8.5:1	155@4200	235@1600	n/a	ZB	ZG	standard Base
L30	V-8	Pontiac	350	3.88 x 3.75	2 bbl	8.8:1	255@4600	355@2800	n/a	WU	YU	standard Esprit, optional Base
L65	V-8	Pontiac	400	4.12 x 3.75	2 bbl	8.8:1	265@4600	397@2400	n/a	-	XX	optional Esprit
L78	V-8	Pontiac	400	4.12 x 3.75	4 bbl	10.25:1	330@4800	430@3000	n/a	WT	YS	standard Formula 400
L74	V-8	Pontiac	400 Ram Air III	4.12 x 3.75	4 bbl	10.5:1	335@5000	430@3400	n/a	WS	YZ	standard Trans Am, optional Formula
L67	V-8	Pontiac	400 Ram Air IV	4.12 x 3.75	4 bbl	10.75:1	345@5400	430@3700	n/a	WH	XN	optional Trans AM