Install the trigger first so that you can inlet the stock for it. You may find that you have to mill out the trigger guard just a little bit to fit that Timney also, and you want to have everything in the proper relationship before you glass it. Next, float the barrel. You can put a couple of wraps of tape (Brownells sells an excellent tape for this purpose) around the barrel before you glass it, and the job will turn out perfect with the tape insuring that the floating is uniform. When you glassbed the rifle, remove the trigger and use modelling clay to fill the hole for the pin that holds the trigger. When everything is set up the next day or so, you may have to cut out a little of the bedding compound if it flows into areas that you have inletted, but that is fairly easy to do. Use plenty of release compound. Everyone has a favorite, and I have never found anything as easy to clean up after as Hornady One Shot Case Lube. This stuff is an aerosol that works great for reloading, but the main reason that I keep it around is to use as a release agent. Don't use Pam. It will oil-soak your stock.
Good luck!
Clemson