59a/b engine crank bolt question

[zoegrant]

I would like to establish oil pressure in the engine before starting that has set for many years...I have no battery or starter installed at the present time.
My questions are these......with the spark plugs removed would I be able to turn the engine over using an impact socket on the crank shaft nut to try to test oil pressure ?????
Or would the impact wrench distroy the threads on crankshaft snout ?????