hey guys. turbo on and NA SR - i know there are previsions on the block but im not too confident on drilling into the block 140mm for an oil gallery.

So im thinking of picking up water pressure from the thermostat housing and return/drain into the water from the top radiator hose.

for oil return will go into the sump with a fitting and pressure im thinking of drilling the oil filter housing.

what do you guys think/suggest?

There was a bloke who successfully turbo'd his NA SR on the bluebird forums. I just had a quick look and apparently there are mobile drill and tap guys who come to you and can drill and tap the holes in the motor without getting swarf in the motor by pressurising the galleries.

If you can, I'd say drill the holes.

yeah that seems the way to go hey. just need to check wether that water gallery is 100% level or whether it tapers up or down. from the looks its straight and level.