.035
The proper spark plug gap for a 1980 Chevy 350 Pickup is .045, according to spark plug manufacturer (Autolite, Bosch, NGK) specs.
0.045
( .035 inch ) for a 1972 Chevrolet 350 cubic inch V8 engine
30 degrees dwell
A/C spark plug is---R44T and the gap is 0.035
The spark plug gap for a 1991 Chevy Silverado 2500 V8-350 is .035, according to major spark plug manufacturers (i.e. Autolite, Bosch, Denso, NGK).
If you are running the stock HEI distributor, .045" is good.
Use a dwell meter to set the gap at 30 degrees.
Use a dwell meter to adjust the points to 30 degrees dwell.
i know on a 75 Chevy scottsdale with a 350 it is 35 thousandths
0.019in
.045.