Bill,
Doug Mann and Oscar went thru how to straighten/raise the frame tangs on a Fox for me a couple year back. Basically, the upper tang gets straightened from the line it projects from the frame at about the point where it comes off the hole for the toplever. You can straighten it by simply heating it with a propane or oxy-acet torch and squeezing it in some alum softjaws of a vise. Then the lower tang of the floorplate needs to be raised to keep the distance between the upper and lower tangs the same as orig to allow the orig screw to fit. This will raise the triggers and require a refit to the sears, if I recall correctly.
You don't need to raise/straighten the tangs to make a straight stocked Fox, but it'll look twice as good if you do. If you don't raise them, the upper tang has this curvature downward and it looks conflicting to the straight line formed by the bottom of the stock from butt to grip area. My Savage made SW already had higher tangs than my Philly guns and only required a little straightening of the top tang with no lower tang adjustment to get the right lines.
Doug had some pics that showed straightened tangs on his finished guns vs. some others that didn't. It's worth the work IMO.
Of course, once you're done with the tangs, the stock won't fit and you'll definitely have to do the Devcon bedding thing to make a pattern around the grip area. Use the Devcon in the inletting area because it's stronger and will hold up to the stylus of the pantograph and some shooting if you need to.
