Indeed Stu, but at least Spence knows when he needs to check things normally

Spence, you have a few choices here mate:

Get some bearings with the holes in
Drill your bearings
Install squirters


Basically the bearings you have are what people like SBD sell as an upgrade on the N/A engine, where the squirter isnt needed due to the lack of heat in the piston.
Drilling them is acceptable, but awkward and obviously you MUST chamfer it off after to make sure there is no sharp edge, i would not recomend this option.

Installing the squirters is a fantastic idea, they have pressure switches in them (spring loaded ball) so they will never starve the crank of oil and yet will still keep the pistons nice and cool, in fact they flow MORE oil in good pressure situations than the standard holes do.

I would go for that option personally.

I know someone who will install them for you for a ton including the supply of the nozzles, but it has to be done into a bare block and its your responsibility to ensure the swarf is properly cleaned out afterwards (it will come back cleaned anyway, but only quickly)