the boost gauge is easy, connect a 't' piece to a vacuum/boost pipe off of the inlet manifold and run the pipe to the gauge, best to connect the illumination into the sidelight output on the back of the headlight switch (use a testlight to assertain which wire goes live when only sidelights are on), water temp gauge fitment depends on the gauge sender type and oil pressure usually uses a 't' piece to connect the gauge supply pipe or sender and the oil pressure switch together, illumination for those is the same as the boost gauge wiring.

chris