The engine identification number is located on a piece of tape attached to the oil filler tube, just above the engine unit number. It contains a prefix code, an engine unit number and sometimes a suffix code. Only 350 or 260, 350 - 3A: 260 - 2A.

EXAMPLE: QK8100001

QK	Engine Code (260 Cid,110HP, 2BC)
8	Model year (1978)
100001	Production Sequence

PREFIX CODE	VIN CODE	CID	HORSE-POWER	COMP. RATIO	CARB	TRANS	COMMENTS
QD	F	260	110	7.5:1	2 Barrel	Manual	Exc. Calif./H.A.*
QE	F	260	110	7.5:1	2 Barrel	Manual	Exc. Calif./H.A.*
QJ	F	260	110	7.5:1	2 Barrel	Auto	Exc. Calif./H.A.*
QL	F	260	110	7.5:1	2 Barrel	Auto	Exc. Calif./H.A.*
QK	F	260	110	7.5:1	2 Barrel	Auto	Exc. Calif./H.A.*
QN	F	260	110	7.5:1	2 Barrel	Auto	Exc. Calif./H.A.*
TK	F	260	110	7.5:1	2 Barrel	Auto	Calif.
TJ	F	260	110	7.5:1	2 Barrel	Auto	Calif.
CDF	H	305	160	8.5:1	4 Barrel		Chevy Built
CYJ	H	305	160	8.5:1	4 Barrel		Chevy Built
DAC	H	305	160	8.5:1	4 Barrel		Chevy Built
CRW	U	305	145	8.5:1	2 Barrel		Chevy Built
CRY	U	305	145	8.5:1	2 Barrel		Chevy Built
CZA	U	305	145	8.5:1	2 Barrel		Chevy Built
C3P	U	305	145	8.5:1	2 Barrel		Chevy Built
CRZ	U	305	145	8.5:1	2 Barrel		Chevy Built

Back to I.D. Your '78-'80 Hurst/Olds, 442, Calais

H.A.* - High Altitude