You will need all the same sensors as in "normal" efi set up.
Fuel rails, injector and so on depends what kind of 8-stack set up you pick.
We finished one just last winter, stroked big block (+600cid) with custom, hand build 8-stack Motec efi. I made a one-off 4" cowl hood that housed about 15gal plenium and air cleaner system.
Just clened my phones from pics, but you can check my company FB-page, there you can see my work.
8-stack is not ideal for street use. Our set up uses large, over 2" butterflyes and sence its a big motor its little "aggressive" to drive.
Difficult to go over 2800rpm with out wheel spin and cloud of smoke.. When its on, its gone..
