ken, i'm just tossing this onto the ring for your consideration.
to gain some breathing room on the front side of the engine which can become pretty busy with the addition of a turbo, especially with air conditioning involved, there are parts available to move the oil filter away from the heat of the turbo body. the divorced or remote oil filter kits include an adapter that mounts at the oil filter location on the engine with hoses that lead to a second adapter which accepts an oil filter. generally, the remote filter mount includes new ports that can be used to mount pressure and temperature sensors. when you move the oil filter and sensors away from the direct path of radiated heat from the super hot turbo body, temperature induced inaccuracies are reduced.
the remote oil filter systems are also very easily adapted to oil cooling systems as well. with the addition of a good oil cooler to a remote oil filter you increase the amount of oil in the system which is a boon to controlling and shedding heat from the inclusion of a turbo.
i doubled the amount of oil in my blue monster turbo3's system with a remote oil filter/ cooler which made the operating temperature of the engine much easier to control.
another choice i made was to use and electrical oil pressure gauge where the pressure sensor converted the measurement to an electrical which kept the actual oil in the engine bay and only required a couple of wires fed through the firewall using the factory wiring harness gromett. same with the manifold absolute pressure signal for the vacuum/ boost gauge. using the electrical gauges keeps the potentially hazardous materials out of the cabin eliminating the potential for spraying 300 degree oil on your crotch in the case of a plumbing failure.
