Luis,

You have a 1998 Mirage. So 1997-2000 Mirages inorder to ensure a proper swap you would need an evo 4-9 engine. Evo 1-3 are for the previous gen Mirages which were 1993-1996 which their engine's are the sit the opposite direction then the 1997-2000 Mirage's. So with that said you would need an evo 4-9 engine not an evo 1-3 engine.

Like I stated in your other thread go to

Mirage Performance Forums :: Index

there's a few people that have done this swap into 1997-2000 Mirage's your questions might be answered better there since its a dedicated Mirage Forum.