1985 Chevy Blazer 4x4 2.8L V6 - Governor?

I am needing to know whether or not my 85 Blazer has a governor on it. The Blazer shifts into 3rd and 4th gears around 4000 RPMs. This seems high to me. I have been reading that recalibrating the governor will help this. I'm pretty sure that the transmission is a 700r4, but I could be wrong. I forgot to mention that it is an S10 Blazer