Hi-po exhaust manifolds

str12-340 said
View attachment 1716226586

View attachment 1716226587
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

According to my service manual, the conical washers are placed on the studs on the #2 and #8 exhaust ports, but none on the #4 and #6 ports. Unfortunately, it only speaks of the passenger side. It only mentions the torque specs for the driver's side. No mention of the conical washers for the driver's side. Would it be safe to say that those washers would be on the #1 and #7 cylinder ports?