See I was talking about a stock rebuild, if you want performance parts then you're going to get into a lot more money depending on what parts end up in the engine.
Quality machine work will cost you more as well.
But again, you can't put a lot of power on these automatic transmissions because they will just explode. They simply can't handle much more power than the stock power and even then their life is on a ticking clock simply because of how automatic transmissions as a whole are made, they're not stout like a manual is where the only thing you really have to worry about is synchros which will be fine if you're not hard on them.