Camaro 1967-1969
	10-bolt	12-bolt
Casting Number	3894859NF	3894860NF
Bolt Diameter	3/8	3/8
Ring Gear Diameter	8.20	8.875
Pinion Diameter	1.438	1.625
Axle Splines	28	30
Overall Dimensions:
Axle tube flange to axle tube flange	54 1/4	54 1/4
Between centerlines of spring seats	42 7/16	42 7/16
Shaft Length	29 33/64	29 9/16

Below is a list of positraction casting numbers. Gearing "up" or "down" indicates that the posi unit is applicable to gearing numerically higher or lower respectively.

Axle	Casting Number	Series	Gearing
12-bolt passenger	ED 32088	2	2.73:1 and down
	30140PM1	3	3.08 to 3.73:1
	EDB 30174	4	3.90:1 and up
Corvette	ED 32297 PW 3	3	2.73 to 3.70:1
	EDB 32298	4	3.90:1 and up
8.5 Corporate	410408N	3	2.73:1 and up
	410409N	2	2.56:1 and down
8.2 10-bolt	ED 32118	2	2.73:1 and down
	ED 30116	3	3.08:1 and up

 

Alternator	Axle	Camshaft	Carburetor
Connecting Rod	Crankshaft	Differential	Distributor
Exhaust Manifold	Intake Manifold	Piston	Transmission
Water Pump