The Cart Before the Horse: Spec 3 Build

[SlimKlim]

This car is an M50 right? There's a coolant drain plug in the head between cylinders 3&4, my gauge kit included a bung to match those threads.

If you're also doing an oil temp gauge don't do a distribution block on the housing, it never gets as warm there as it does in the actual engine. If I still cared about my car I'd relocate that sensor to the oil drain plug. (And move the fan temp switch to the cold side of the thermostat housing so it'll actually switch on)