Just in case you don't know about it already, one of the best places for EFI info regarding the Sniper kit and the FiTech kit is at,
http://www.chevelles.com/forums/89-efi/
They have a thread for Sniper tuning, which has a LOT of great info. I have the FiTech unit (which I haven't installed yet) and they have tons of info on that system too.