.045
.035
.045
0.031 thousandths with spark plug gap tool or just plain 31 as I go by.
.35 , you can also check the label in the front of the engine compartment, it will have all your gaps and timing specs
There are none. I believe they use a perma gap plug.
The 1986 Chevrolet 350 cubic inch engine spark plug gap is .027. Most spark plugs will be pre-gapped by the spark plug manufacturer.
The spark plug gap for an AR135 spark plug on a 350 SBC should be set at .034 inches. This is equal to .86 mm so a spark plug set to .9 mm should work correctly.
.042 to .043 should be good for gap!
.039-.043
'77 - '82 .032 '83 - '86 .028
Check the ignition module in the distributor.
try replacing the coil.