Got it today.
Bit of an issue. Though, you have to give the guy props for his wrapping paper.
Basically, the hole spacing is off, compared to my block. It's also noticably taller - there's a spacer, it appears, under the block on mine so the distance from base to end of block does seem to be about 37", but the block itself has a "32" stamped on it, which eyeballing it looks about right. If I pull the spacer (maybe 2mm) it looks like it'll probably fit, but again the hole spacing is the bigger issue.
I'm going to drop the Floyd Upgrades guy an email and see about an exchange - I'm wondering if I just ordered the wrong part, somehow.
EDIT - the height thing surprised me, so I pulled out my leatherman (which has mm ruler along one side) to double check, because I didn't think I was THAT bad at measuring - turns out, this one's about 47mm tall, which is strange because they don't seem to offer anything that size.
EDIT #2 - nevermind, my Leatherman is a bit misleading the way it's numbered - the scale starts
at 1 because that first mark is exactly 1 cm off the edge of the handle. I came in exactly 1 cm high because I was starting at that 1, and because I'm fighting a nasty head cold and it's a Monday night after work, I didn't even notice.