Relocate Master Cylinder?
http://thehemi.com/forums/viewtopic.php?f=3&t=1198 ( I sure hope its OK to post this link)
Not alot of difference sizewise between a 354 and a 392 and that fella did it.
I'm still unsure of how much the MC offset adapter actually 'offsets' it. In the link you'll see a pic that, to me anyway, looks like the MC moved over a substantial amount, like 3-4 inches, I can't really see if he used the adapter or not.
Funny you mentioned a 65 Coronet because that was my other choice. It was a matter of what's available and how much it costs. Darts are still relatively cheap. Its going to be a long process. Right now I'm working on just getting the /6 running so I can move it out of the way so I can fix my grocery getter (I wonder if hauling the hemi in the trunk had anything to do with the air suspension giving up? Months apart but makes you wonder) Never ends.