Hello everyone; I recently acquired a 1950 MGTD with a 1600 Cortina engine in it. The casting on the block is 2737E 6015A. The PO used an MG dipstick, and I don't know if the level marks are correct. So my question is how much oil is in the crankcase of this engine when its full? In other words, how much oil should I add when I change the oil and filter? Once I have this amount, I'll file a new full mark. The engine is fitted with two nice Weber 40DOEs and an exposed exhaust header. Thanks for the help!