Definitely soak the bolts down multiple times with PB blaster. You'll need some long ratchet extensions and a swivel adapter also to have the most clearance. It really isn't that hard of a job to do, just very tedious and you have to make sure you get it bolted up correctly to the manifolds or you'll have a leak and will have to start over. I've done that a few times haha.
Torque: It's like crack for your right foot