Hi I'm Leon I have two Montes, one it's a 2001ls, the other one is a 2001ss. I would like to know if I can swap the 3.4 out the ls into the ss which is a 3.8

 

I'm sure you can since you have both vehicles to swap needed parts but I feel that is not a smart idea. Why would you swap a smaller engine into a SS? If the 3800 is bad then just get another 3800 and put in it. These 3800 engines are cheap and tons out there