imoprting a car from Toronto

I am looking at importing a 180sx from toronto, I need to know what I need to replace to make it meet DOT standards, I also have a friend who is looking at going at the same time and getting a prelude. Where can I find te info needed to make both of these legal to import?

EDIT: Cars are going to be imported to South Dakota and we have no emissions standards, so they just have to go for Federal emissions standards

Is it a JDM 180SX or a 240SX? If it is a Canadian market 240SX it's pretty straight forward. Same as the Prelude.

If it's a JDM 180SX then you can't import it legally.