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Answered 2006-07-18 01:49:58

I've never seen a 75 Chevy 350 that didn't come with HEI, as it was a mid-year introduction in 1974. However, if such a thing as a 75 Chevy with point distributor exists, there would be a steel wire running from the ignition switch to the hot side of the coil. The steel wire would need to be replaced with a copper wire. The steel wire acts as a resistor to reduce the voltage to the coil, which is not necessary on an HEI, and would limit the total voltage the coil could produce.

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