I don't know how to post a drawing, but you should torque an intake in three stages starting with the four center bolts and then going down to each of the four corners. It's generally a circular pattern that starts in the center and works it's way out to the edges.
An auto repair manual such as Motor's or Chilton's can be very helpful in this situation.
torque specs. on chevy sub for a 5.3L intake manifold and tighten sequence NEW ANSWER; step 1 is 44in-Lbs. then step 2 is 89in-lbs. That's it.
the sequence is the two center bolts on each side, the work your way outwards
.035 FT. LBS.
30f
40 lbs
35 Ft. Lbs
35 ft. lbs.
35 ft. lbs.
30 ft/lbs on a cast iron intake.
1996 chevy c1500 pick up 305 motor bolt torque spec intake manifold
The 350 cubic inch Chevrolet intake manifold bolts have a torque specification of Haiti pounds psi. The bolts should be torqued at 40 pound intervals.
45, for an iron intake, 35 for aluminum.