Questions on installion a JDM 4g63

[XtremeGST]

What is the difference between the US and JDM models of the 4g63? I heard that there is a different bolt pattern. i know there are others such as turbo and intake, but anything else? if i did a engine swap what would i need to be able to complete it? (US to JDM) this is on a 97 eclipse GST

 

[V8HAHA]

There is a ton of stuff to swap in a b bolt JDM into a 2G. Might wanna searth though because this has been asked many times.