i live in ohio and it gets to around 40-50 in the summertime (cold starts) should i even bother with this mod???

i have a 95 z28 with full exaust, full cai, and tune.... and some other BS boltons...........

 

It doesn't matter where you live. The coolant in the TB has nothing to do with cold starts. If nothing else, it makes it easier to take off the TB when you need to.

 

The coolant flows through the throttle body to prevent "icing" of the blades..... probably not a concern as long as you live south of the Arctic Circle. Many of us have driven in 0*F winter temperatures with no problems.