So I have been traveling the country doing a Department of Defense contract and all the while buying up parts and having them shipped to the house where my wife still is with the family and the toy. I have a 95 z28 so it has the vented opti. I bought a meziere water pump in a factory housing and it is sitting in the box in my garage now. Since I am making really good money right now I am going to keep piling up the parts for when I get home. Should I get the Cloyes single roller 9-3157 or the double roller 9-3145? I want the assurance that it will handle the strip street, but I am only running a bolt on 383. As always your help is appreciated. Thanks guys.