Replacing the O-320 with a Verner 9s on a Hatz Classic

[Beechdrvr]

Hoping toe get some input here. I would like to use the Verner radial on my Hatz Classic. I've noticed in the plans that there is a difference in Thrust lines between the two engines. My question to the group would be what drives this change in lines, since both engines rate near the same horsepower. Could torque enter it as well? I'm wondering if the same thrust line could interchangeable between the Rotec and Verner.
Follow up would be if anyone has done this conversion and flown it, what where their findings?
Thanks
Doug D

 

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