Im selling my brand new in the box still Procahrger F3R-121. I thought I could tame it enough to make it work for my street/track application but have found that it would be more complicated than my wallet can afford. So my mistake is someone else's blessing. The unit is a quality product and it pains me to let it go but I don't have the right combo of parts to make it work. It comes with all the brackets needed to mount it to a SBF engine and it also has the crank support. These supercharger makes up to 3000hp and for someone building a drag car it would be perfect. For more info on it you can visit the Procharger web sight or contact Steve Morris racing engines. He has used them on all sorts of builds and is the man when it comes to Prochargers and can help you find any parts or info that you need to make it work with your application.