/ Six Exhaust Manifold replacement

Well my new exhaust manifold for my slant six arrived today. So I will be tackling that soon. Unfortunatelythe box was ripped and the little baggy holding the nuts and bolts was opened and some of the nuts and bolts fell out in route. SO I called the seller and they are sending replacements. Another week of waiting for the new parts. Sure wanted to get it done this weekend. This will be my first exhaust manifold replacement EVER. So any advice from any of you experienced people for this job is welcome.