stock cover torque is 30 ft lbs.

fill plug is 25 ft lbs.

edit: source, 2006 FSM

 

Stock bolts I think have a wide flange head and can be torqued more, when I changed to solid covers one of the supplied bolts snapped when I torqued it to that, 5/16 bolt torque should be more in range of 18-22 ft/lb if I remember right, I bought some grade 8 allen drive srews for my covers.

 

I talked to riddler and they agree with you, I torque 20-25 no problems even with my lube locker gaskets which tell you to torque to 35lbs! Grade 8 or stock bolts will go to 30lbs without an issue though.

 

So I should be good at 25 ft lbs for the cover and what should the fill plug be?

 

5/16 grade 5 torque spec is 19 ft lb and will very if dry or lubed, grade 8 is 29 ft lb. I used HoloKrome button head screws and they spec 16 ft lb oiled with their alloy. I threw away riddlers screws I didn't like them. For the fill plug I don't think a torque wrench is needed I just tighten it till it feels right, you don't want to over do it or drive it all the way thru the plate

 

the correct torque value is two grunts past snug.

make sure to check the suspension at full bump. the SOLID covers are notorious for hitting the track bar at full bump.

I had to modify the heck out of mine:

here's how you check full bump:
http://www.jeepforum.com/forum/f9/unlimited04s-lj-build-778715/index21.html#post11060714