The last item that I installed was an EGT probe attached to a modified Edge Products power module. The power module originally intended to be for 1999 1/2 to 2002 Dodge trucks w/ Cummins ISB engine using a VP 44 pump. This is a very useful module since it has two I/O that can be assigned and several A/D inputs. I kept the EGT probe calibration from the original truck use and modified the module to show digital vacuum. In monitoring the vacuum I can drive conservitively and also see the EGT of gasoline fuel VS CNG. This will help me determine if I have a heat problem when adding too much CNG.