All street hemi engines backed by an automatic used the gear reduction starter and its in the same location as the manual, why are you saying it won't clear the exhaust?
If there is a 6 bolt flange on the crank(ok its odd) the stock flywheel should bolt up and so will the stock starter.
** all high performance big block engines got a stronger starter, easily identified, its about 1/2 inch longer on the black part. Also used on trucks!