Due to the HEI thread from Gedoensrat, I am currently hard to think about whether I am not retrofitting a few additional ads with my Buick. Just to not fully spam the thread from Gedoensrat and to keep a certain clarity, I have now opened my own thread. I would like to retrofit ads for: – Speed – Water temperature – Oil pressure – Volt. Since a few in my circle of acquaintances have had good experiences with VDO, I would like to al I would also like to take the matching encoders/switches from VDO but the first questions come up with me. My 455cui has only one warning display from my factory for water temperature and oil pressure. I would like to keep these. At VDO there are switches that can both display a value and give a warning signal. I found out that the switch for oil pressure a 1/4 inch x 18 Gewin Only what kind of thread the switch has for the water temperature in the suction bridge, I could not find out so far. What I found was an indication 1/2 inch x 14 NPT but if that fits? Maybe one of you knows that. Oil pressure I would take this. Pressure indicator up to 5 bar, warning message if the water temperature sensor is below 0.5 bar. If the size is right for the water temperature sensor of 1/2×14, there is only one variant with warning switch and this one here. Max. display up to 120°C, Warnton from 103°C. The question that arises here is enough for the measuring ranges for the motor? I would install the whole thing in the glove compartment. Where and how exactly, I would only deal with it later. With the schematic for a better overview. Here you can also recognize the two currently installed switches.