A quick addition regarding the elongation of the bolt holes. Page 7-3 states "Before installing a new manifold, the dowel pin holes and bolt holes should be increased 1/32 inch in diameter to enable the manifold to expand and contract without buckling." Also goes on to state "Apply a liberal amount of anti-seize compound #1052771 to the manifold face and head face to increase manifold life. The compound appears to create a hard slate-like film with a very low coefficient of friction allowing the manifold to expand and contract...". In addition "torque the center bolts to a full 40 ft. lbs. torque and slightly less torque for each bolt as you proceed towards either end."
2013 Winnebago Aspect 27K
Lives in South Western Idaho