Confirm torq. specs.

Chilton shows 35 ft*lbs for 273/318/340 which is what I went off back in 1996
But then,
First time torqueing those skinny 273 intake bolts I turned around to put away my tools only to hear a deafening BANG as one of the bolt heads sheared off and hit the underside of the hood. Lucky my face wasn't right there.

I really wanted to redo that whole job over. Lol that sucked. That iron intake is a boat anchor