For 333882 Chevy heads, the recommended spark plug is typically an AC Delco R45TS or equivalent. The proper spark plug gap is generally set to around 0.035 inches. It's always a good practice to consult the specific engine specifications or service manual for your application, as variations may exist based on the engine's configuration and intended use.
.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.
.035
The proper spark plug gap for a 1980 Chevy 350 Pickup is .045, according to spark plug manufacturer (Autolite, Bosch, NGK) specs.
follow the plug wires they are on the heads
That depends on what type of heads are on each, and the year it was built.
.045
.045
.035
.035
.060
.035