Hey Vince, I did some research and it looks like the MORryde RPB72-770-06 pin box is only going to work with pin boxes with a Fabex 770 bolt pattern so it's not going to work with your Lippert Rhino pin box.
You'd instead need to use the MORryde Cushioned 5th Wheel Pin Box for 14K to 18K Trailers w/ Lippert Rhino # MR83QR which is designed specifically to replace the Lippert Rhino pin box. view full answer...