Regardless of the orientation of the engine block (pan rails up or down) the stack of the parts needs to be the same:

Block
Side gaskets
End gaskets
Oil pan

The tabs at the end of the cork gaskets are supposed to fit into slots in the timing cover and rear main bearing cap, with the rubber end gaskets overlapping them. Then the oil pan sandwiches the stack together. The only practical way to achieve this orientation is to glue the side gaskets to the block, followed by overlapping the ends of the side gaskets with the rubber end pieces. Some type of contact cement is your friend in this situation!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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