Engine of barn find-steps to evaluate/save

Need assistance with a motor. Not sure if it is worth trying to salvage and run.

Starting a restoration on a 61 Valiant with a slant six. It's been sitting outside for a few decades and I’ve no idea, of course, what it was parked.

Soaked the cylinders and got the engine to rotate.

It turns clockwise (looking from the front) but only rotates the other way a little without stopping. Not sure why??

I gather dropping the oil pan is more of an ordeal than many old engines. It had oil, and no water in it.
The water pump seems to spin, the alternator sounds bad, but does turn.

Need some next steps….

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