It does not include the torque's however. Although I find references to the applicable torques being between 71 and 106 in lbs.I hesitate to suggest such as inappropriate torque can crack the manifold. If you become a free member of Autozone, you can download their variation of a service manual for the 2003 Taurus. The user manuals do not include torques. An alternative is to sign into https://cardiagn.com/ford/taurus/. You can find a generalized torque chart at https://www.taurusclub.com/forum/82-maintenance-repair/349683-trying-find-official-torque-specs.html but determining the steel quality of your bolts strikes me as an esoteric bit of knowledge. Here is a YouTube regarding removal of the manifold: https://www.youtube.com/watch?v=s8o6UWs17bU
Hopefully, one of these service manuals will have the information you seek.
Answers & Comments
This is elusive online. I have found an image file relevant to the sequence.
https://www.google.com/search?rlz=1C1AVFC_enUS829US829&q=2003+Ford+Taurus+3.0+DOHC+torque+spec+and+sequence+for+the+lower+intake+manifold+torque+specifications&tbm=isch&source=univ&sa=X&ved=2ahUKEwi8pJeFjZzkAhUGd6wKHSpLDXgQ7Al6BAgIECQ&biw=2049&bih=937#imgrc=z8P_Ni5hpyi4vM:
It does not include the torque's however. Although I find references to the applicable torques being between 71 and 106 in lbs.I hesitate to suggest such as inappropriate torque can crack the manifold. If you become a free member of Autozone, you can download their variation of a service manual for the 2003 Taurus. The user manuals do not include torques. An alternative is to sign into https://cardiagn.com/ford/taurus/. You can find a generalized torque chart at https://www.taurusclub.com/forum/82-maintenance-repair/349683-trying-find-official-torque-specs.html but determining the steel quality of your bolts strikes me as an esoteric bit of knowledge. Here is a YouTube regarding removal of the manifold: https://www.youtube.com/watch?v=s8o6UWs17bU
Hopefully, one of these service manuals will have the information you seek.