I had the trans tunnel of SPF887 off a couple of years ago. The sealant used by SPF is tough stuff, but it is still much easier than pulling the engine and trans. We used body calk strips to seal the tunnel when it went back together.
It is said that a picture is worth a thousand words....
http://www.clubcobra.com/photopost/s...0&ppuser=14970
hope this helps,
Jim Kellogg 887
Elmira, NY