360 oil pan gaskets….One piece, 4 piece??

I’m curious about the differences in oil pan gaskets for the 360 engines.
A friend here is building a 408 based on a 2001 casting 5.9 that was a Mopar Performance crate 360/380. The oil pan on it is center sump for use in cars.
The gasket kit he bought is the Fel Pro 260-1723 which translates to the following..

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The oil pan gasket is a light blue rubber or silicone one piece design…

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That looks really slick. I didn’t tear down the engine so I don’t remember what the old gasket looked like but this looks great.

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Does anyone know if these one piece gaskets fit older 360 blocks and pans?
I remember that the 360 pans have a smaller rear oil seal than the 273-318-340 which I find to be strange.