you are right, i think it was 4" bore and maybe 3.58 stroke but I am probably wrong, didnt it come out in 94? I think that was last time I paid attention to one...only remember a few thinks were common to magnum V8's.
Pretty sure it was '94 for the Vipers and Ram V10s. They weren't 4" bore and 3.58 stroke, I wanna say like 4.03 bore and 3.79 stroke. They were 488 8.0Ls originally in both, Magnums always were until they quit making them in '03.