I don't even know, what I don't know (if that makes sense), but from what I've read it's a big buck undertaking. The elephant motor is highly sought after by many and expensive to "do" right.......
I saw a 426 Hemi on eBay not rebuilt for $17K, one that was rebuilt w/4 spd for $27K.
you can build a perfect Race hemi Clone for about 22K... this includes the mag crossram...
I guess I'm saying that there's a lot more to it than a (good) block. Is your Dart set up to receive a BB/ K member all that?
no becasue the hemi takes special mounts, non factory... at least for the correct race hemi stuff...