Wow, nice find! I apologize for our forum being a bit quiet lately, people seem to be busier nowadays.
Overheating either really hurt the motor, or didn't hurt it at all. With the 13B, there's little in-between, although by the sounds of it, the engine probably cooked quite well.
You say you live in Oregon? Check out Pineapple Racing, a great shop with a high reputation from what I've heard!
http://www.pineappleracing.com/contact-us.aspx