wanted: Chev CMP chassis views

[Hanno Spoelstra]

Translating the above to identifying technical specs per vehicle type (limited to C30 and C60S as this the object of our discussion):

C30:

• Front axle with 5” steering ends
• Brakes, front drum: 14” diameter, 2” width lining
• Brakes, rear drum: 15” diameter, 3.5” width lining
• Wheel size: 16” rims
• Differential gear ratio: 7.16 to 1
• Rear spring leaves: 12

C60S:

• Front axle with 6” steering ends
• Brakes, front drum: 15” diameter, 3.5” width lining
• Brakes, rear drum: 15” diameter, 3.5” width lining
• Booster actuated brakes
• Wheel size: 20” rims
• Differential gear ratio: 7.16 to 1
• Number of rear spring leaves: 12 + 6 Aux.

So the Chevrolet I am trying to ID is a C60S, by virtue of having:

• 6” steering ends - see the picture with six cap screws
• 12 + 6 Aux. rear spring leaves - see the picture showing the auxiliary springs
• True, it is fitted with 16" rims, but it is possible to fit these on 15" diameter brake drums (C15, C30 have 16" rims on 15" diameter rear drum brakes)

Now, if I check if the subject vehicle has (had) a brake booster, I am sure this is a C60S rather than a C30.

Riddle solved!