Why would you put such an old engine in your '00?

I think you'll have a lot of trouble getting help as most people don't want go with such an old engine, especially when you could bolt in a B-series into your car. If the D15B is blown and you have that in there (again, why?!), just replace that with a D15B. You lose power otherwise, and it would be simpler than trying to do another hybrid.