Prefer Refresh Rate Over Resolution

Is there any way to get Coreelec to force specific output resolution/refresh rate for a specific input resolution/refresh rate. I have a lot of content that is 1280x720 @ 23.976 Hz which is not a standard resolution. Kodi automatically sets the resolution on the TV to 720P@ 60 Hz but the content looks much better @ 1080P @ 24/23.976 Hz. The only way I can think of forcing it to use the 1080P @ 24 is by blacklisting all the 720p/i resolutions. I was just wondering if there is something else under the hood that could be used to force this.