Dodge Dakota/Durango Kenne Bell supercharger kit onto ‘72 318?

Using the Magnum timing cover on the LA would … most likely the need to swap to a short-nose cam to clear the Magnum timing cover.

Not an issue. Magnum TC has the same clearance for the cam as an LA TC. Can’t use a mechanical fuel pump, but you don’t need a short nose cam to run the Magnum cover.