When were tower hose clamps phased out on Chevrolets

[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

[Bill Pritchard]

Originally Posted by Ralph Spears

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.