Mod plz delete this post. I found all my info in your very helpful FAQs post.

 

Last I researched....

Federal US Regulation: You can swap passenger-class US-Spec Motor 91 and newer, provided the emissions control systems are updated to match the donor vehicle. Something like that. All non-us-spec engines are illegal for use on public roads.

California: Same as above, but you can also use a comparable non-US-spec engine provided both engine and chassis emissions are brought up to US-Spec for the US-version of the donor vehicle. This may just be rules the inspection stations follow, and not so much the local "law". So check first before heading to any local DMV for inspection. Unfortunately JDM swaps are still technically illegal everywhere in the USA.

 

Thanks broski, I got my answers I was looking for, just couldn't figure out how the hell to delete my post so it didn't clutter the forums.
If you know how to do that, let me know! Can't wait to start working on my 91 EF.