Engine ID Codes

153 L-4				OA	OC	OH
230 L-6	BA	BB	BC	BD	BF	BH
250 L-6			CM	CN	CQ	CR
307 V-8				DA	DB	DE
327 V-8 275 hp					EE	EA
327 V-8 325 hp				EP	ML	MM
350 V-8					MU	MS
396 V-8 350 hp						MX
396 V-8 375 hp					MQ	MR

Advertised Engine Rating

Engine Designation	153 L-4	230 L-6	250 L-6	307 V-8	327 V-8	327 V-8	350 V-8	396 V-8	396 V-8
Availability	Base	Base	RPO L22	Base	RPO L30	RPO L79	RPO L48	RPO L34	RPO L78
Carburetor	One BBL	One BBL	One BBL	Two BBL	Four BBL	Four BBL	Four BBL	Four BBL	Four BBL
Comp Ratio	8.5 : 1	8.5 : 1	8.5 : 1	9.0 : 1	10.0 : 1	11.0 : 1	10.25 : 1	10.25 : 1	11.0 : 1
Gross Brake HP @ RPM	090 @ 4000	140 @ 4000	155 @ 4200	200 @ 4600	275 @ 4800	325 @ 5600	295 @ 4800	350 @ 5200	375 @ 5600
Gross Torque @ RPM	152 @ 2400	220 @ 1600	235 @ 1600	300 @ 2400	355 @ 3200	355 @ 3600	380 @ 3200	415 @ 3400	415 @ 3600
	Super-Thrift	Turbo-Thrift	Turbo-Thrift	Turbo-Fire	Turbo-Fire	Turbo-Fire	Turbo-Fire	Turbo-Jet	Turbo-Jet

Camshaft Specs

	L-4 153	L-6 230	L-6 250	V-8 307	V-8 327	V-8 327	V-8 350	V-8 396	V-8 396
Intake
Open-BTC	17 30	16	16	28	28	40	28	40	44
Close-ABC	54 30	48	48	72	72	86	72	80	92
Duration	252	244	244	280	280	306	280	300	302
Exhaust
Open-BBC	57	46 30	46 30	78	78	88	78	88	86
Close-ATC	15	17 30	17 30	30	30	38	30	32	36
Duration	252	244	244	288	288	306	288	300	302

Overlap				58	58	78	58	72	80
Valve Lift In	.3973	.3317	.3880	.3900	.3900	.4471	.3900	.4614	.5197
Valve Lift Ex	.3973	.3317	.3880	.4100	.4100	.4471	.4100	.4800	.5197
	Super-Thrift	Turbo-Thrift	Turbo-Thrift	Turbo-Fire	Turbo-Fire	Turbo-Fire	Turbo-Fire	Turbo-Jet	Turbo-Jet

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