I went with the Dakota Digital mounted to the shifter in the same place as me4osu. Summit was backordered of the brand that they carry when I was ready to order so I went with the Dakota. Reads 0-30, or with a sender change 0-75 or 0-150, and you can set it to start flashing if the pressure is higher or lower than a range you set. They told me repeatedly that the guage and sender are OK w/ diesel and warrantied for 2 years, if this helps any.
Mike