I just installed a Derale (DER16217) from summit. It fit on the front opening of the radiator support. I used the mounting hardware and bolted it to the rad support with a 1/16 clearance between the radiator and the fan. I had just brought a new radiator from Griffin with two 1 1/4" tubes and did not want to push those tie straps throw my radiator. I'm very happy with the way it work out. With this fan there are two speeds High and low. I brought two relay kits. The frist comes on at 180 Deg for the low speed and the second comes on at 190Deg for the high speed. mines a big block with no outlets on the water pump for the heater, so I have lots a outlets to install the temp sensors. I'll try to get pic's for you.Ron