What should the timing be set to on a 86' GMC pickup with a 305 ci. ?
Country: United StatesMake: GMCModel: 1500 High SierraYear: 1986Engine: 305 ci.
Which vacuum line do i plug?
remove the vacuum line off the vacuum advance on the distributer and plug it off then set it to 4 degree's
15 years gm master tech/15 years ASE master tech