I did some googling about it and I haven't found a concrete answer Whether it's legal to import and rx7...

Just buy one already here.

This is for you.
nhtsa (dot) gov/cars/rules/import/

And as far as anything else goes, it needs to 25+ years of age before importing.

a jdm one is so much cheaper

Because you can't import it yet

keep it in a garage for a year

>register car as Canadian/Mexican
that would require going to canadia or lmaomexico
FUCK that

Importing it before it turned 25 makes it near impossible to register.

They can confiscate it at the port that it arrives.

Actually in japan you can find a clean rx7, skyline, supra, 300 ZX. But honestly OP just wait on the 25 yr rule then its a antique and you dont need to follow U.S emissions.

Let me just call my family in Canada and Mexico so I can register my car to their address.