Rear airbag questions

i picked up some eibach drag springs and i just have a question about the airbag:

1) which way should the nipple for the airbag face? up or down? (for the airline)
2) what kind of tubing should i use, the guy cut the old one. size?
3) about wat coil of the spring should i fish the tubing through? thanks alot guys
 
I have one Airlift bag in the right rear. It is installed with the nipple up, through the hole above the spring pocket. That should work. It takes some planning to get the bag in and the air line attached. Mine came with some 1/4 in (I think), sort of hard plastic line. Try a parts store. It is similar to the harder style plastic vacuum line. It just pushed on and works fine.