When I still had some of the 64 GTO vacuum parts (long since moved on) I think the hoses around the check valve after it came out of the front carb to the bracket on the pass side had some of those squeeze plier clamps on it. But most of it didn't have clamps.
But most vacuum hoses don't have clamps such as dist vacuum or the short hose on the tube on the choke. Unless the hose is old and brittle with splits the vacuum sucks the hose tighter and clamps are not needed. New soft hoses are nice.
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