Ive dropped plenty of engines so that is not what is putting me off.
I understand there is a small risk to what i am planning to do but many have had success doing it this way. As i said im going to be very careful and take the risk.
My clutch is also not being changed at this point, so i would rather change the clutch when my second engine is built that will eventually replace the one i am going to drill.
I am going to thoroughly flush the sump and run about 10litres of fresh oil from top to bottom of the engine and then fit new filter etc etc. Again this is no guarantee, but i have seen some pretty large chunks in the bottom of sumps before (Not on my car, i should add) when changing oil or gearbox oil and the pan filters/main filter do a darn good job of stopping them go elsewhere. Granted metal anywhere is not a good sign, just saying they were stopped from travelling elsewhere, although i know thats not always the case.