changing registration

Changing Chilean plates so we can drive to USA?

Hello fellow wanderers.

We have a beautiful 91' Kombi from Chile. We are currently cruising Argentina. 

When we return to chile in 6 months time we want to drive to USA.

Here's the problem. With Chilean plates you can only be out of the country(chile) 6 months before you have to return. This makes our dream impossible, so my question is.

Can we change plates in chile to American as foreigners to do this beautiful trip? Or are there any other solutions?

Hope to hear from you,

Amalie, Jonatan and the Kombi Appa ;)