This is the beauty of so many of us having the same tank.
Here is the setup it’s 15 inchs t piece to t piece. Between the elbow and valve it’s about 13”. You could remove the valve and place it but you won’t have space for unions. You would also need to add a valve somewhere. This was my second build out, the first one had a very small leak and because of my design the whole thing had to be trashed.
I do plan on adding a union to the left side so I can drop the whole thing out of if I want.
I’ll also add that if I was to do it again I would angle it towards the tank and move it over so I could attach a bracket to that white vertical support and have it sit in it.