Thanks for the advise everyone. I'll be re-fabricating the rear section of my porsche cooling system to seal the leaks off. I will probably cut a hole in under the license plate light as well while i'm at it.
And to solve my cold air intake issue, i'll be putting an air intake inside the right rear guard, the same as James did with his turbocharged vw. Have a look at:
http://members.shaw.ca/sharkeysgarage
CHeers everyone!
Ian