Help to identify Axle on 68 Newport Convertible

I'm trying to find what axle is on my car to order seals. I seem to be out of luck matching the casting numbers I found to anything standard. Anyone who has seen an axle with this look/numbers? 440 with 727 but was originally a 383 so it might have an axle for that motor still. I found "246" "199" and a single number 2 on the casing so far.

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