Just an idea here, maybe go to a custom fab shop and describe what you want and let them build a custom heavy duty aluminum bracket to serve the purpose, with this idea, you have the option to have it built any particular way to improve access and minimize interference with the motor. I can recomend VanWeld in Verboort, OR. It is probably a far drive for you but they are the very best at this, they build custom boats and sleds amoung many other gadgets to get you fishin' in style!