74' Heater Hose Tower Clamp Size

[Robert S.]

The 73/74 Technical Information Manual and Judging Guide says the heater hose Wittek Tower clamps sizes are 1 1/16 for the 5/8 hose and 1 1/4 for the 3/4 hose.
I have what I believe is one of the original tower clamps for the 3/4 hose and it is marked 1 3/16. I have read other discussions on this board about the use of 1 3/16 clamps on C3 for years other than 74'.
Question: What are the proper size Wittek tower clamps at the engine for 74' heater hoses (for a small block with air)?

[Edward J.]

Re: 74' Heater Hose Tower Clamp Size

Robert, that may be a misprint, I have a 72 a/c car and the 3/4 hose is 1 3/16 clamp, and the 70-72 JM says 1 3/16 for the 3/4 hose.

[Robert S.]

Re: 74' Heater Hose Tower Clamp Size

Thanks - I also believe it must be a misprint. I was hoping that someone with a 74' with original clamps could provide clamp size info.