Wittek tower clamps?

[71CHEVYSHORTBED402]

Wittek manufacturing company made the original tower clamps under our hoods.

I found three in my 71. Two for the air cleaner extension to PCV valve, and one for the power steering reservoir. Pretty sure they're original. All three are marked Wittek MFG. Co. 1 1/4 DCM. The hoses are 3/4" ID.

My 72 may have two, both for the power steering. No sign of "Wittek" on the outside of the bands. They're marked 1 3/16 4/71...............On a side note, IMO 1 3/16 is a little snug for a 3/4" ID hose.

Anyway, few questions for the "all" knowing.

1. They make reproductions and some if not all of them are trash. Not just reproductions, but they may have the Wittek name and markings. How can you tell one from another?

2. What hoses used a Wittek clamp from factory?

3. What sizes where used for what hoses? I suspect the 3/4" ID hose uses a 1 1/4". The 5/8" ID used a 1 1/8 or 1 3/16.


All input/history appreciated, thank you