Well that mod is for 1.2.5 mods specifically, not 1.6 mods so there'd really be no way to make it work with it without really heavy modification to the code. So really it's still better to just rewrite the mod for 1.14.4. Although I think there might be a 1.2.5 release on the original github page somewhere if you wanted to try it out.
I have two questions
1) Will 1.14.4 port run with forge?
2) Will you upload a source of 1.14.4 port?
That's all. Thank you!
Yes to both of those questions. The only reason this version would be on Forge is due to no SSP mod since at this point the integrated server is much better than it was back in 1.3, and also it would be nice to be able to use it with other mods as well so you're not limited to just OldDays or other mods. And I see no reason why it wouldn't be open source, especially since the original was open source as well.
If it doesn't work out in the end for the whole mod, ports of some parts of it (especially SSP and the old mob AI since the 1.14.4 AI is trash and I couldn't find any other mods for that) would be nice. Anyway, looking forward to it! And thank you so much in advance.