383 deck clearance
There are several different piston configurations for a stock 383. On top of that, you have no idea of where the deck height is on the block. Suffice it to say that it's tall from the spec. With those two variables alone, there is no way to make a blanket statement regarding deck clearance and I've not even thrown in possible replacement pistons. The only way to be sure about deck clearance is to measure it.
With my 383 I had the rods resized and trued to length. The crank has been indexed. The block has been decked to a predetermined measurement (9.956) for zero deck height, so I already know what my deck clearance will be. I have a good machinist so I know it will assemble right. If anyone throws you out a number for deck clearance, you better take it with a grain of sand, cause it's most likely WRONG.