I never got a answer about my above question. I'm still confused about what you want? Do you need a new build, is it just for the enjoyment of doing it, are you just looking to have the same power at a lower rpm???
If it's just for the 6bbl setup, just bolt it on with the "X's" and enjoy it. I just can't get past spending 3,4,5k on a new engine, just to have the same output as you currently have......
Maybe i'm missing something, or i should just bow out of this discussion.