69 3932386 L48 should it be a 4 bolt and forged crank

[69RALLYSPORTZ28]

Has anyone rebuilt an original October 1968 built L48 with a 4 speed that could confirm or document that it must be a 4 bolt block and must have a forged crank.
I am hoping not to have to ask the owner of this engine I want to purchase, to remove drain the oil and remove the oil pan.