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.035"
.035
They are in the heads where the exhaust manifolds are bolted to the heads. The plugs have rubber wires hooked to the ends of them.
The proper spark plug gap for a 1980 Chevy 350 Pickup is .045, according to spark plug manufacturer (Autolite, Bosch, NGK) specs.
.045
.045
That depends on what type of heads are on each, and the year it was built.
follow the plug wires they are on the heads
.035
.035
.060
.035