Did a lot of research on this site and TC with no definitive answer, so here goes: 1969 396 exhaust manifold bolts-cast iron heads. I know the resto parts book show a shouldered bolt used throughout, but a guy I met at a show with a 69 396 Chevelle tells me that 2 different bolts were used. Where the larger hole is in the manifold, the bolt with washer is used and the shouldered are used on the other holes. This would be 1/2 and 1/2,8 shouldered and 8 w/washers, if correct. Can someone shed some light? Along this topic, as I understand, No french locks used? No heat shields on plugs? correct? Wanting to put an end to the BS and get the facts. Thanks, as always.