http://www.renegadehybrids.com/944.htm
I got the $8k conversion figure at the end of the 4th paragraph.
All the rest is educated guessing. $1k for non-running 944, $2k for V8, $1k for used 951 trans, $1k-? for odds and ends. Maybe $13k was a low estimate. I've looked into the conversion, but not very seriously.