Admittedly this was an assumption on my part but I thought the OP meant positive camber (curved on top) by the above remark. I await correction by the OP.

If my assumption was wrong, then my suggestion may also be wrong since it was based on the above assumption.

I was trying to come up with a plausible reason why angling the engine further upward would result in an increase in up-trim required. I think I have one.