Stolen from another forum, but a good read - a re-release of an older article in 2008.
http://www.classicandsportscar.com/news/csc-features/the-affordable-supercar-porsche-911-32-carrera?utm_medium=EMAIL&utm_campaign=ENews%20Bulletins&utm_source=March%2025,%202014&utm_content=latest_feature_top_1
http://www.classicandsportscar.com/news/csc-features/the-affordable-supercar-porsche-911-32-carrera?utm_medium=EMAIL&utm_campaign=ENews%20Bulletins&utm_source=March%2025,%202014&utm_content=latest_feature_top_1