Yes you want two MLS gaskets to seal as best as possible...

With regards to the rest of your spec.. seems a bit of a mis-match.. have you uprated your valve springs? If not you wont be going anywhere really..

The Nissan injectors don't fit in the zetec rail properly.. that is if you understand how o-rings are supposed to work..

You don't really need the 2L TB or cams.. 1.8 stuff is fine..