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.