Using the Classification Chart:

Simply move your cursor across the chart. Anywhere the chart turns yellow, you can click and get information.
If you click on a cell in the chart that has the power-to-weight factor (numbers in the cells in the middle of the chart), you will open a page that shows you all the classes for the car (left-hand column) and engine (top columns) combination.
If you click on some of the cells at the top of each column that describe the engine, you will open a page that show the engine tech specs, or blueprint information.
If you click on one of the cells in the left column that shows the car description, you will open a page that shows information about that car-model-body style.
If you want to learn more about the classification process, click here.

CHEVY II 1966
	153	194	230	283	283	283	283	283	283	327	327	327	327	327	327
	90hp	120hp	140hp	195hp	195hp	220hp	220hp	220hp	220hp	275hp	275hp	275hp	275hp	350hp	350hp
St=Stock, SS=Super Stock				Stk	SS	Stk	Stk	SS	SS	Stk	Stk	SS	SS	Stk	SS
Transmission	All	All	All	All	All	Man	Auto	Man	Auto	Man	Auto	Man	Auto	All	All
Notes - See below										1	1	1	1	1	1
														Manual only	Manual only

100 110" wb
Sedan 2 Dr	28.00	20.46	18.75	16.92	14.23	12.12	12.28	11.71	11.91	10.31	10.16	9.45	9.20	9.84	9.42
Sta Wag 4 Dr 6		22.30	20.42	18.23	15.33	13.05	13.23	12.61	12.83	11.09	10.93	10.16	9.90	10.59	10.13
Sedan 4 Dr 6	28.16	20.57	18.85	17.01	14.30	12.18	12.34	11.77	11.97	10.36	10.21	9.49	9.24	9.89	9.46
NOVA 110" wb
Sta Wag 4 Dr 6		22.53	20.64	18.38	15.46	13.17	13.34	12.72	12.94	11.18	11.01	10.24	9.97	10.67	10.21
Coupe 2 Dr Sport		20.89	19.14	17.25	14.51	12.35	12.52	11.94	12.14	10.50	10.35	9.63	9.37	10.03	9.59
Sedan 4 Dr		20.62	18.89	17.06	14.35	12.22	12.38	11.81	12.01	10.39	10.24	9.53	9.28	9.92	9.49
NOVA SS 110" wb
Coupe 2 Dr Sport		21.40	19.60	17.49	14.71	12.52	12.69	12.10	12.31	10.65	10.49	9.76	9.50	10.16	9.72

Stock/SS Factors	90	128	140	164	195	229	226	237	233	274	278	299	307	287	300
				01/01/15		08/26/03	01/01/17	01/01/23	01/01/16	06/29/16	01/01/19	07/22/09	01/01/10	01/01/11	01/23/02
Stock/SS Factors w/Rep Heads										279	279	304	300	292	305
										01/01/18	01/01/18	07/24/06	01/01/16	01/01/18

CHEVROLET 1966 1/1/2019 PC

Notes:

1 - Accepted Replacement heads: RHS Cast Iron Heads #12400 & #12402. Dart Cast Iron Heads casting nos. 10021070 & 100220010. World Products Cast Iron Heads casting nos. 043600 & 043610. Edelbrock heads #60887, 60647,60637, or 60617.