Basic Dimensions for SAE Housings and Flywheels
Basic Dimensions for SAE Housings
SAE Hsg No	Pilot Diameter	O.D.	Bolt Circle	(See Note Below)	Flywheel Housing Bolts & Bolt Holes "E"
	"A"	"B"	"C"	"D"	Qty	Hole Diameter	Bolt Size
"00"	31.000	*	33.50	*	16	*	1/2
"0"	25.500	*	26.75	*	16	*	1/2
"1/2"	23.000	*	24.38	*	12	*	1/2
"1"	20.125	21.75	20.875	3.49	12	.484	7/16
"2"	17.625	19.25	18.375	3.94	12	.433	3/8
"3"	16.125	17.75	16.875	3.94	12	.433	3/8
"4"	14.250	15.88	15.000	*	12	.433	3/8
"5"	12.375	14.00	13.125	*	8	.433	3/8
"6"	10.500	12.12	11.250	2.81	8	.433	3/8
All dimensions are in inches unless otherwise specified. * 3.94 for 8" clutch; 2.81 for 6" and 7" clutch. "D" = Depth of pilot bore from housing face to shoulder on flywheel or to chrankshaft flange face.
Basic Dimensions for SAE Flywheels
Clutch Size	Drive Ring Pilot	Bolt Circle	Housing Face to Flywheel	Pilot Bearing Bore		Bolt Hole "K"
	"F"	"G"	"H"	"J"		Qty	Size
6.5"	8.500	7.875	1.19	2.0472 (52mm)		6	5/16
7.5"	9.500	8.750	1.19	2.0472 (52mm)		6	5/16
8"	10.375	9.625	2.44	2.4409 (62mm)		6	3/8
10"	12.375	11.625	2.12	2.8346 (72mm)		8	3/8
11.5"	13.875	13.125	1.56	2.8346 72(mm)		8	3/8
14"	18.375	17.25	1.00	*		8	1/2
18"	22.500	21.38	.62	*		6	5/8
21"	26.500	25.25	0	*		12	5/8