Hi-po exhaust manifolds
Closest I could find from existing photos... this is one of the reproduction bolt/nut/washer kits and was identical to the 50 year old bolts that came out. By the way the cone washers are to change the pressure of the nuts and bolts on the fragile cast iron "ears" where the manifold mounts to the head. Pressure in the middle would split the cast iron, where pressure around the edge tend to press the cast iron together
Closest I could find from existing photos... this is one of the reproduction bolt/nut/washer kits and was identical to the 50 year old bolts that came out. By the way the cone washers are to change the pressure of the nuts and bolts on the fragile cast iron "ears" where the manifold mounts to the head. Pressure in the middle would split the cast iron, where pressure around the edge tend to press the cast iron together