VERTZX

i have a gm stage two.. from what i hear they run rich, and i would like a tad more power, so im looking into buying a 2.8 pulley. will i need to change my belt or add a tensioner to make it work? it already has the stge 2 belt so..?? and will the gm 42's handle that? i want to get it dyno tuned as well... any thought?

and im also thinking about one of zzp's fmhe's how are they 2 install and how much willl it affect my cooling? in traffic my coolant temp hits 224..also, i am getting 19.9 mpg
also, is it ok to run a 2.8 (with 2 step colder plugs) with no other cooling mods???....please help
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