Deinterlace a DVD lossy using QTGMC hybrid?

[Selur]

Normally doubling the frame rate&frame count should ne cause sync issues unless you input if vfr.

I was hoping for 1920x1440 since its 4:3 Anime I'm working on

Okay, if you are working with animes, forget any QTGMC tuning as it's not worth it. Preset 'Faster' should be fine.
You probably might want to look more into Anime4K, Waifu2k and similar upscalers.

Cu Selur