Ive had one on my car for a few years now. I got a sandwich adaptor through Summit. The oil cooler was from a '90 Caprice police pkg (taxis also had them; 80's also). This cooler is a nice one, good size. I installed it in front of the radiator next to my tranny cooler. Fittings are no big deal. You can get them at a hardware store, or like I did, from Auto Zone. I got the type that is meant for rubber hose to push on to it and clamp with a hose clamp. One side of the fitting is threaded and the other is flared with ridges to go into the hose and stay there. On the sandwich adaptor I used elbow fittings to make the hose travel forward towards the radiator and not straight up and then bend forward. The hose I used was also from AZ. Its the hose marked for oil/tranny coolers. Remember we arent working with an extreme amount of psi here (80 tops, on some of our cars). The tranny produces more psi and the kits for those coolers are set up the same way, with hose and clamps, and same type of fittings I used. You dont have to have screw on hydraulic hose.