Can someone steer me in the right direction for a OEM fan motor??? The dealer is asking list price which is over $300, I've been told I can find one cheaper then $200.
To answer your question... you will need the adaptor to make it a plug-n-play system. I got mine when they had the free adaptor special. With my front mount I couldn't mount it very well. I ended up stuffing it down between one of the pipes and the radiator. I used a few tie straps to hold the top on. In high 80s weather my temps stay around 180 or so with a 160 thermostat. Remember this is with a front mount and while idling. It is a very good deal!
I got the Ramchargers factory fan adapter, and use the factory wiring. It has toasted a few relays, I would recommend the Ractronix dual-fan harness upgrade. http://www.racetronix.com/RX-G7-DFH.html