OK , I am no expert at all with these bridges, but I think it should be sitting flush. This means you might need to tap the receivers in a little further. You may need to use a 'punch' or 'drift' to tap them in a bit without further damaging the finish.
There are a couple of ways to set these up (Floating/NonFloating) so you might need to do a bit of off site research to work out what you want to do. Heres one article I found:
http://diystrat.blogspot.com.au/2011...atocaster.html
I just guessed and fiddled with mine and it seems fine for what I want.
I think what you have there would still work, but someone else might have some better information for you.