you have any machinist buddies? Its almost always cheaper to buy a 10/27 spline np205 locally (craigslist, $100 or less) and just have the input bored for the larger bearing/input than it is to get the blingin, uncommon and very sought-after th400 version. I'm using a 31-spline ford input in mine... basically got it for free after selling other parts off the 2 cases I got.
j