Brand New Engine

[SVX PlayBoy]

Ok, so my parents tell me I'm leaking oil on the driveway. I take it to the shop where we normally go for easy fixes. Long story short, he found the leak, but also found that my crankshaft was doing some serious damage. The pulley that it is attached to is moving, and it is wearing away at the timing case. He said there are two ways to fix it, a rebuild/overhaul, or a new engine. I went with the new engine. He sourced this engine from Indiana. I think he might have said that it is a JDM version of the H-6. With that came more questions I need answered. My first was, I have the ECUtune stage 1 installed. Will it be affected at all with the swap? Second, If it is the JDM version, will it be compatible with my wiring harness and ECU? Also, is there anything different between the US spec and JDM?

Thanks in advance