Ok to the last two posters. First off 400hp is quite realistic & I'm doing it because I can & I wont to. I know the trans is going to need beefed up I pointed out in my first post as well. I didn't ask anything about cost because I'm quite well aware of what I'm getting into. There is no point in me buying another block if this block is the same because all the internals will be NEW AFTERMARKET stuff. If you would read more closely maybe you would have seen that.
This is why I don't stick around car forums long, just to many damn na sayers. I've been out of the car scene for a few years & I'm walking back in with something completely new. This engine isn't the only thing being done, the whole car is & that being my reason for any extra time. I'm looking at turning this car over in about a months time once the engine comes out.
I have a bit of planned body work, a bit of interior, the engine & trans, & suspension I need an extra time I can get.

Joe, they mention what to you is the obvious because they don't know how much you know. We haven't met you, and don't know your knowledge or experience level.

I would personally thank them for their kind advice, and let them know that you already knew that.

If you have a problem with the posts here, you should try other forums and see how relaxed and nice it is here.

Sorry maybe I did come back a bit snappy, but I think I made it pretty obvious what I was doing. I'm just used to the all to common people who wont to try to tell you what can & can't be done because their lack of knowledge or experience. Or just because they think their way is the only right way.
I've grown up working on cars most of my life, in fact bodywork is my profession. So I know my way around a car, but building up a V6 is new for me cause I've always built V8'* & I'm not completely familiar with the block differences yet.

Joe, I felt the same way when I came here at first. I thought, "Why are these guys knocking down all my ideas? Some attitudes they've got!" But I was mistaken about their intents. Nobody here is trying to discourage anybody. People like Willwren are speaking from experience. If they tell you something isn't worth the time, it'* probably because (unfortunately) they've wasted the time learning that themselves in the past. They don't want you to repeat a mistake you don't have to.

As you surely know, anything is possible with money. A 400HP, *reliable* daily driver costs big bucks. Remember the fast/reliable/cheap triangle from the Fast and the Furious? If you pick 2, you can't have the third? I hate to quote that movie, but it' soo correct.

A while back I built a 3100 (yes, a 3.1) that put out 238 WHP, over 300 HP when spraying. Could it be considered a waste of money? Yes. Could the same amount of money (and believe me, it was a lot) be much better spent in a 3800 and yeild much better results? You bet. But as with my "little project that nobody had tried before", if you're comfortable spending the money and you will gain satisfaction from doing it, DO IT! We don't grow if nobody tries new things. Anything you learn will only help others, and you, in the future.