Oil drain. Pump Priming

I’m after any advice / experience anyone may have re this please. The engine is a 4.3 (pre serp). The car has had to stand unused for nearly 11 months.

Having started her up oil light remaining on and it was quickly obvious that the all the oil has drained back to the sump which is apparently something that’s common with the pre cat engines.

I know obviously need to prime the pump and I can see that there are two common approaches having packed the pump with vasoline which is either to spin the engine on the starter or remove the distributer and spin the pump with a drill.

I’m favouring the drill because I don’t really want to spin the engine with the starter if I think there’s no oil in the galleries but my understanding is that the drill approach can be a bit hit and miss and of course means likely knocking out the timing.

I’d be interested for any advice, or experiences anyone has had with either of these methods and it anyone has managed to fill the oil galleries by any other means before spinning the engine (I’ve seen various other approaches on non-Rover engines of pumping oil around by removing sensors and accessing the oil pathways.).

Any advice greatly appreciated.

Thanks.