Thinking of building a BOSS 302 bottom end and have some questions!

Hey guys so I plan on trying to build a bottom end since I have some stuff planned and I know I won’t be able keep the stock block alive. About how much am I looking at to build the whole bottom end including everything like balancing and so on? I want to get the ford boss 302 (M6010BOSS302) and I want to build a bottom end that can handle about 900 which I won’t be there for a while but I do plan on creating a monster!

I plan on putting it into my 91 GT since I’m going to be slapping 2 turbos on it once I get my Holley terminator x and some injectors I’m going to down tune since I plan on pushing it even more after the bottom end!

Any internals yall would recommend or just any input is appreciated!!