http://www.club202.com/forums/showth...ht=boost+gauge
Here you can see where you could tap a oil pressure sensor.
http://www.club202.com/forums/showth...d&pagenumber=3
Heres how i mounted the oil temp and press,its feed from the block and then feeds the turbo,you could do somthing similar and use the fitting to the turbo as a bleed screw instead.
Cheers,
Paul