here are some cutoms i wanted to show

No, it's still a BR 9F. I don't think the GWR ever used smoke deflectors, and the Kings and Halls have a tapered boiler (with a safety valve mounted directly before the firebox). Their running boards are very different as well. However, KaizouThomas did use Murdoch's boiler and firebox for an Olton Hall and it looked right (though it seems he reshaped it since).