Zerostart 3100057 Engine Block Heater for Buick, Cadillac, Chevrolet, Ford, Mercury, Lincoln, Jeep, Pontiac, Continental, Oldsmobile, 1-5/8-Inch Diameter | CSA Approved | 120 Volts | 600 Watts

This is a great frost plug heater. I like the plug connector at the heater, there is no issue with the wire getting pinched or twisted and when installed the cord is facing the front of the engine. For a 600 watt heater, it really does a great job, so well in fact that my 1972 Chevy K10 with a 350 engine is too warm to engage the thermostat controlled high idle on the Holley carburetor. [...]