Doesn't look the safest way to work under your Z. If you would have knocked any one of those blocks of wood the car could have collasped on you. It is not worth getting hurt because you didnt spend the few extra bucks to get proper stands. Even cinder blocks would have been a better call. Just my insight. Other than that congrats on the work.
Shawn Lane "Project Never Ending" It will be done sooner or later.