Ward;
When I installed the manifolds on my Desoto engine I hand first tightened the 4 bolts that connect the intake and exhaust. I then mounted the manifold assembly to the engine and tightened the 13 nuts and bolts to the specified torque. Once this was done I then tightened the 4 bolts that connect the intake and exhaust to the recommended torque. So far (2000 or so miles) I have had no problems.
Don Coatney
