Attaching a gasket to the oil pan is a really good way to get a leak, no matter how careful you try to be. Stick the cork side gaskets to the block first, with some type of quick-setting adhesive like trim cement, contact cement, etc., then do the same to the end seals, MAKING SURE THE END SEALS END UP OVER THE SIDE GASKETS- - - -cork against the block, and the end gaskets sandwiched between the pan and the side strips, cork or rubber. DO NOT apply sealer to the pan side of the gaskets, side or end.

Then use a TINY bit of RTV sealer right where the side gaskets and the end pieces join. I rarely, if ever manage to use up a whole tube of RTV before it hardens up in the tube. That stuff is one of the most-over-used gasket sealers I can think of.
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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