I'm glad that you want to keep developing this mod even with True Nukes Continued being ready to go, because Stopgap seems to have better compatibility.
I was trying to run True Nukes with pY recently but got compatibility errors at game start, whereas Stopgap seems to work just fine.
Obviously I haven't actually fired anything yet. Getting to the point of being able to produce nuclear weapons in pY is going to take another hot minute, lol. But the game doesn't complain and the bombs show up in FNEI with properly converted recipes, so it should be fine.

Stopgap Nukes is usually more compatible with stuff than True Nukes because I took a lot scripting shortcuts so there is less stuff that can break which means less work for me. For example the crater system is a lot simpler, the explosion scripting is simpler, and I don't have a framework that automatically adds new nuclear warheads to mods that add new types of weapons.