1966 Chevrolet Engines
Year	Engine		Carb	Bore and Stroke	Piston Displacement Cubic Inches	Compression Ratio (Standard)	Maximum Brake H.P. @ R.P.M	Maximum Torque Lbs. Ft. @ R.P.M.	Normal Oil Pressure Lbs.	Spark Plug Type	Spark Plug Gap	Point Gap adj. in to misfire then out	Dwell Angle	Firing Order	Ignition Timing BTDC or Mark	Grnd +/- Volts
1966	90 H.P.	4-153	1 Barrel	3.875 x 3.25	153	8.5	90 @ 4000	152 @ 2400	30-45	AC 46N	0.035	0.019	31-34	1342	4°	-12
1966	120 H.P.	6-194	1 Barrel	3.5635 x 3.25	194	8.5	120 @ 4400	177 @ 2400	30-45	AC 46N	0.035	0.019	31-34	153624	3° Std 8° Auto	-12
1966	140 H.P.	6-230	1 Barrel	3.875 x 3.25	230	8.5	140 @ 4400	220 @ 1600	30-45	AC 46N	0.035	0.019	31-34	153624	4°	-12
1966	155 H.P.	6-250	1 Barrel	3.875 x 3.53	250	8.5	155 @ 4200	235 @ 1600	30-45	AC 46N	0.035	0.019	31-34	153624	4°	-12
1966	195 H.P.	V8-283	2 Barrel	3.875 x 3.00	283	9.25	195 @ 4800	285 @ 2400	30-45	AC 45	0.035	0.019	28-32	18436572	4°	-12
1966	220 H.P.	V8-283	4 Barrel	3.875 x 3.00	283	9.25	220 @ 4800	295 @ 3200	30-45	AC 45	0.035	0.019	28-32	18436572	4°	-12
1966	275 H.P.	V8-327	4 Barrel	4.001 x 3.25	327	10.5	275 @ 4800	355 @ 2800	30-45	AC 44	0.035	0.019	28-32	18436572	8° / 2° AIR Auto	-12
1966	300 H.P.	V8-327	4 Barrel	4.001 x 3.25	327	10.5	300 @ 5000	360 @ 3200	30-45	AC 44	0.035	0.019	28-32	18436572	6° / 4° ATC AIR	-12
1966	350 H.P.	V8-327	4 Barrel	4.001 x 3.25	327	11	350 @ 5800	360 @ 3600	30-45	AC 44	0.035	0.019	28-32	18436572	10°	-12
1966	325 H.P.	V8-396	4 Barrel	4.094 x 3.76	396	10.25	325 @ 4800	410 @ 3200	50-75	AC 43N	0.035	0.019	28-32	18436572	4°	-12
1966	360 H.P.	V8-396	4 Barrel	4.094 x 3.76	396	10.25	360 @ 5200	420 @ 3600	50-75	AC 43N	0.035	0.019	28-32	18436572	4°	-12
1966	390 H.P.	V8-427	4 Barrel	4.251 x 3.76	427	10.25	390 @ 5200	470 @ 3600	50-75	AC 43N	0.035	0.019	28-32	18436572	4°	-12
1966	425 H.P.	V8-427	4 Barrel	4.251 x 3.76	427	11	425 @ 5600	460 @ 4000	50-75	AC 43N	0.035	0.019	28-32	18436572	10°	-12