Heads s/b torqued to 80 ft./lbs. Rods s/b torqued per rod/bolt manufacturers instructions. (rod bolt stretch is the most accurate way to torque a rod bolt. JEGS 80590 - JEGS Rod Bolt Stretch Gauge - JEGS ) Mains........depends on what version of stage II you have. On center, off center...... Find a Buick power source manual for details.