LA engine oil pan rubber end gaskets

I have rebuilt a dozen or more LA engines in my 65 years but the old mind is getting cloudy. Every small block I remember had two different size round holes in the pan for the round "tits" on the rubber oil pan gasket to go so there was not a question about which way they install. I am going through a 71 318 and the holes in the oil pan are the same size. the rubber end gaskets are shaped different on each side with a taper and straight side and have one big and one small "tit" so no way to clock them with the holes. Which way do they go???????

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