Hopefully the pictures will provide most of the information needed. It’s going to be a tight fit. The ? Proper orientation will require elevating the plates to clear the engine base- and only give about 1/2” of adjustment. The engine is as far forward as reasonable. The yellow mark up is some of the case I believe I can trim away. The vertical orientation is a thought but I don’t know if that gives much adjustment on the chain. Couple questions- How much adjustment does one need? Like half a links worth? Why is there an extra hole in the plate? And how much of the plate can I safely trim?