This engine has an Eagle crank. While I have not compared a SBC and a SBM Mopar crank from Eagle, I would imagine that Eagle uses the same "high speed oiling" arrangement in all their crankshafts, regardless of brand of motor. The way a crank is made, you can move the timing "some" but it isn't a huge amount. So while it may be true that factory Chevy and Mopar cranks may differ in timing, I would think aftermarket cranks are drilled the same. Would be easy to find out........all you have to do is ask them.

BUT........that isn't the problem here. SB Mopars been running for years with factory drilled cranks.

As far as the oil, some need to read up on how multi viscosity oils are rated, tested and really work. The oil in question here would not have taken on the viscosity characteristics of 50W until the oil temp reached 212*. And anybody who has ever drained some HOT, even straight 50 from a motor, knows at that temp, it is not all that thick