Costs vary a lot man. It all depends on what you do to the motors before you put them in and how much you can do yourself and what tools you have to buy/rent....

I suggest going to the hybrid forum and asking them. They're the gurus on this.

I've spent over $5000 on my B18C1 swap but I've completely rebuilt it and had machine work done. I actually haven't spent that much for what I've done... Just go out and find the parts and stuff on the net and add it all up. That should give you a rough estimate at least.