i have a zzp stage 2 to the exact. on the website it states its ok to go from a 3.1 to a 3.0 without getting another pcm or another tune... will i be safe? or will i end up leaning out? my friend has a gm stage 2 however with a 2.8 pulley... he leans out sometimes... i NEVER received a lean code...

 

It is fine with a 3.0" pulley.