x1xlp

So I got some new gauges for my Z. i.e. Exhaust Temperature Gauge, Transmission Temp, Boost, Air Fuel. I was wondering if any one knows how to install them because I have no clue how to wire them. It's a 1990 300zx TT and I need to find where the ignition is in the engine and also the trans fluid pan. also if anyone knows what size a 18npt drill bit is because i need to drill a hole for the exhaust temperature gauge in the manifold.

thanks