all your basic nitrous questions are answered here in the link...the guys that post in this forum are very knowlegeable...convinced me to get a system...it's in the mail...the "halo kit" from nitrodaves.com
http://ls1tech.com/forums/showthread.php?t=140389
btw...if you're gonna want to spray a dry kit (one that relies on the fuel injectors only to add fuel), spray before the MAF
wet kits add nitrous and fuel together and should be placed after the MAF