Check this out:
These guys have V8 conversion kits for Porsches...
Renegade Hybrids
Heres the youtube video:
996 V8 by Renegade Hybrids - YouTube
Not sure how I feel about it. Point of the Porsche is the engine for me. I love the sounds and feel of the thing..... However, if your stranded with no engine this is an interesting why to have some fun with the left over parts.