It will be fine. Drill the block and mount the starter. A small portion will overlap the edge of the block. If you know anyone who welds you could weld in a piece to fix it. Using SS rod will prevent cracking of the cast iron.
I have the "HT"3.4 in my trooper and the starter is not a problem on the left side. I'll find the picture and show you what their talking about but it is not a problem. Just get rodney dickmans starter drill jig and you will be fine.