removed the turbo tail and factory hinges and installed the ducktail using TRE 911R hinges. i put the turbo script back on just because it seemed more appropriate as the car was originally and is mostly still a 930 and it has plenty of horsepower. since i have lexan rear glass i also used TRE retention clips to keep the lexan rear window in place. most likely will mount an oil cooler ibetween the rear bumper and front of the engine in the area where there are slots. i have a space 24 inches long by 4 inches wide by 6 inches tall which should give me lots of latitude to size and place. the Mast Motorsports oil pan has two cast in ports for an oil cooler so the lines should be easy to run and very short. the authentic Ruf bumper only weighs a few pounds. i noticed that the rear of the car is noticeably higher. the LS7 as well as the ducktail probably net a minium of 75 pounds over the original turbo tail and motor.