To remove the oil pan on a 1936 Standard you MAY have to remove one end of the tie rod and drop tie rod out of the way. This process plus removing the pan should take an amature a few hours.
The Chevrolet shop time to replace the pan gasket was less than two hours.
Make sure it is the pan gasket that is leaking, There are several more common
places for oil to leak making look like it is the pan gasket such as the fuel pump, side cover or rocker arm cover gaskets or the rear main bearing (which has no seal).
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