HRL,what gauge is the wire feeding the HEI from the ignition switch on a stock GM vehicle? Is it fused on a stock GM vehicle? Is it the 20 amp fuse labelled ignition and ECU,the supply for the HEI on GM vehicle I've seen?
I have a HEI on a 235 in my 53 truck.It's got a 15 amp Buss fuse,been that way for years.
Langdon says the big wire is to limit feedback or harmonics on the circuit.
An Amp meter inline on the HEI shows about 3 amps at idle,rising an amp or two with increase in RPM.I'll check it while cranking too.
