Did you sonic test that block first before boring it? If not do that now, a lot of the Mopar Mega blocks won't bore safely to 4.500 or larger, usually 4.410 or smaller is the normal bore size on them
As far as the steel rods on a 4.500 stroke crank with the Mopar rod journal size clearing the cam you should good, always check everything on any non stock motors
If it does not clear the fix is using the BB Chevy rod journal sizes and rods with the same stroke