I/O SF to Outboard, no bracket

[Sf20]

I am considering doing something similar to what Frizzle did with his 1974 Sceptre with my 20sf that is currently i/o. I am kicking around the idea of converting it to outboard, but would like to do it without having to use a bracket. Do you think that bracing the transom by adding a few knees connecting the transom to the hull would be sufficient to support an outboard? I know that the SF hull was also made for an outboard, so I thought that I could just maybe modify the transom of my i/o to resemble the transom that they made for outboards so that it could structurally support an outboard. Advice and thoughts?? Is this doable without a bracket? Is it advisable without a bracket, or will it cause stress to my hull?