Any of the oils listed above are fine. SAE 30 is SAE 30. Good for motor oil, power steering fluid, hydraulic fluid, etc
Pull your drives and pressure test
Check your alignment, bellows, u-joints and gimbal
Block drains (each side of the block, just above pan rail)
Manifold drains (hex plug on back of manifolds)
Large J hose
Raw water hose from raw water pump to PS cooler