Torque specs for OMC 140 manifold?

Question

Does anybody know the torque specs for a 1977 OMC 140hp (181 ci 3.0 GM) manifold? Mine cracked and I am replacing with a new manifold but want to get the torque right on it.

Answer 1

Start in the center and work to the out side snug then tight with a 3/8 ratchet you wont break the bolts then>

Answer 2

call the dealer or get a 1977 manual and a new gasket

Answer 3

More from memory, first snug all the nuts, in a staggered manor, then torque to 25 ft. lbs. center, left-end,right end...remaining!  Good luck!!!!