My 1973 spitfire (just acquired) has had the engine rebuilt about five years ago by a garage. The engine has not been used and the sump had not been filled. I filled with oil yesterday and this morning, having removed the distributor and drive gear, I primed the oil pump and using a screwdriver end attached to an electric drill, turned the oil pump in order to get oil into the bearings before turning the engine over. Unfortunately, the oil managed to escape from the back of the engine pouring out at the bottom of the bell housing! I didn't notice until I had lost nearly all the oil. Took about 1 minute to empty. It is now engine or gearbox out to inspect. Anyone have any ideas where the oil might be escaping from? Is there an oil blank off at the bell housing end perhaps? Cheers, Steve