The AMP pulley will fit the standard factory Chrysler crank dimension.
I don't know if manufacturers other than Callies are beefing up that section. For a timing chain, it doesn't matter since nothing uses that OD of the crank. It is just a shoulder for the timing gear.
I posted a question asking people to measure other crankshafts. See the "Moparts Question and Answer" section. It would be nice to know in advance if anyone else like SCAT, Ohio Crankshaft, 440 Source, Molnar, etc are using the big dimension.

As of today (6/14/21) people have reported the following using the larger dimension: Callies, Eagle
Crank snout dimension Moparts Question & Answer LINK