Which MSD box should I get?

[SmokeyDP]

I was thinking of getting a MSD also, I heard great things about the 6AL, I dont plan on doing too much, maybe heads/intake or blower. How hard is it to install one of these things and what stock parts come off after u put this on? I have been debating it for a while cause I wasn't sure of the benefits. I heard the car runs more effecient and gas mileage increases a bit in some cases?

Thanks
Scott

------------------
1992 GT 5.0L Convertible
BBK Shorties
Flowmasters
All Power
Super Chip