technically you need it all. But realistically none of it is hurting the performance. What you attempting to accomplish? Ditch cruise control, a/c, etc. But why?
Removal of the evap canister(what I thinking you mean by emissions bottle) will give you a vacuum leak, so plug the hole. Also should plug the tank hole. However now the gas fumes have nowhere to go so you accomplished nothing.
84 xj 350tbi, sm465, 203/205, 60/70. links and other junk.
what size sawzall blades does it take to fit 40's?