Ant;
I wouldn't use WD40 either, prefer any engine
oil, just a squirt or two will suffice....
I'm assuming you have an external
oil pump??? as you say it is not connected???? If so, don't worry about the bearing, there's no real load on them turning the motor over by hand....
If you have a wet sump system and OEM type
oil pump, then for insurance you can pull the distributor and spin the oil pump before you trun the motor over, assuring everything is well lubed, if not, don't sweat it, but, by all means keep lubing the cylinders and turning the motor over by hand...............
David