You have to wait till the 25 year birth month comes around. it doesn't matter about what safety features or what emissions crap it has on it (which it doesn't have enough of either for USDM standards). If those things did matter, newer cars would be easier to get over.
get something that is closer to 25 years old, and will turn 25 about the time you are ready to ship out. The only exemption to the pre-25 year laws are cars that are listed on the NHTSA's website. Most of them are rare cars and still require to be modified to comform to some USDM standards once they arrive. It is much easier to just deal with something that exempt from all regulatory bodies when you want to return home.
PS if you are planning to mod it there, remember that the clean air act requires "original motor in unmodified state" so don't get too crazy with engine mods.
worth reading
https://help.cbp.gov/app/answers/det...r-into-the-u.s.