i've heard stage 2 provides a small performance boost in some applications but you must use 93oct fuel and you will get less mpg because the chip/module richens the fuel mixture. stage 1 is not worth it, especially since its for stock vehicles. best solution is to either try to burn a custom chip or reflash the 95's computer to full OBD2 and use a program like efi live, or something similar, to create a custom tune.
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2000 Chevy Blazer ZR2
Performance Mods: Numerous
Suspension Mods: Some, but not enough
Exterior Mods: Just Right
1987 Buick Turbo T Dark Red
Low 11 sec sleeper
.030 4.1 block, PT6262E, & other odds and ends....
My Cardomain