just seeing that ^^ screenshot, isnt the quality supposed to be more grainy with those film reels? preserving the grain might need a lot of bitrate, please dont do any DNR (intentially or not)

not familiar with the technical process of what you are doing, but this is what it looks like when someone made a 40GB blu-ray for Back to the Future sourced from 210mbps JPEG2000DCP (you might have seen this before):

I dont know if its possible for your restauration to look like that, but if it is then it would be great!