[jordanatkins305]

i have a 390 that's newly rebuilt and i wanted to know if their are any recomendations for plug gap and ignition timing. it's in a heavy 3/4 p/u and will be used for offroad and some pulling. everything is exactly stock and new, except for the holley 600 cfm four barrel. i'm using autolite platinum plugs that were recomended by the autolite application guide, but i don't have the numbers with me at the moment. thanks in advance for any help.