When were tower hose clamps phased out on Chevrolets

[92646]

I was looking at an old Hot Rod article of when the 1970 Z/28 was first introduced and I noticed that the car did not have tower hose clamps on the radiator hoses. When did tower hose clamps get phased out and what was the next style of clamp used for the hoses?

[McCune]

tower clamps on 1974 Camaro.

[Ralph Spears]

Early seventies worm type on radiator hoses & tower type on heater hoses

[Danzo]

Many GM cars used them into the late 80's mainly on smog. See them on Ebay all the time.
Doc

[Ralph Spears]

I have a coffee can full of the later ones from the late seventies assorted sizes

[Tracker1]

Survivor 1979 Z28, 11,000 mile car that was always garaged. Witteks on rad hoses etc.

https://nastyz28.com/threads/1979-camaro-z28-11-897-miles-survivor-one-previous-owner-garaged-since-day-1.339994/

Firebirds were the same.

[Bill Pritchard]

Early seventies worm type on radiator hoses

That's news to me.

[Ralph Spears]

I had a 1973 Corvette that i bought new heater hoses had tower type clamps on the engine side, but the heater core side had worm type, radiator had worm type. Small block with air conditioning.

[67since67]

A friend has a survivor '70 Corvette LS5, no a/c, worm clamps on the rad hoses, tower on the heater hoses.

[Bill Pritchard]

Maybe it's only on Corvettes?