Appreciate the info, still going with the original plan, kinda have to stuff is already in the mail, the kicker for me is that I already know that the head, cylinder, crank are all in superb condition. Its also nice that they only have to modify the top end. Cost is 766, and I realize you can probably get a 701cc case, cylinder, head, for that price, but from what I read, and feel free to flame this comment, if you bore out a 633 to 701 and do some other basic top end mods you will blow away stock 701's. Do the same mods to that stock 701 and it will only be slightly faster.
http://www.groupk.com/y633-701.htm