how about for the starter you cut the little bit of ear off and use a sleeve for the alignment then run a bolt through the sleeve? another thing is clearance issues for the starrter being clocked in that position.This is a 2015 (Coyote) 6R80 bolted directly to the 351W. Three original bellhousing bolt holes line up; plus, the two alignment dowels line up. I'll probably re-design the alignment dowel closest to the starter to allow the 351W bellhousing bolt to pass thru the dowel and engage threads in the Windsor block. Then, there will be 4 bellhousing bolts.
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There's still a lot to figure out.