ADDITIONAL USEFUL LINKS:
If you want some more details about the QuickJack please do not hesitate to post and ask your questions here. There is also a thread
HERE that you can reference for some additional information as well.
See the QJ being utilized for a successful engine drop in a 911 (Post #30 and #32):
http://forums.pelicanparts.com/porsche-911-technical-forum/773098-quickjack-lift-911-914-a-2.html (image below)
