Plenty of posts on this around here.
Here is my thread from redoing mine last year:
http://www.wellcraftv20.com/communit...ighlight=floor
Here is one from skools:
http://www.wellcraftv20.com/communit...ighlight=floor
A few days may be a little tight. In my case once I did this I ended up doing fuel tank and lines... while I was at it.