I have noticed some guys are running wheel spacers and was wondering if those are safe to run or not.  seems to me that they would put to much stress on the studs and possabily cause them to break off.  does any one have any input on these?

Not if you buy a quality spacer and torque them like the instructions say.  The only downfall I see to wheel spacers is scrub radius (off-road not as big an issue as on road).  I wouldn't be scared to run them.

Spidertrax has an awsome product.  They stand by thier products also.  I know several people to use them with no problems.  A good friend of mine runs 37" tires on his Heep, and drives around Colorado.  You need to avoid cheap spacers.

I have been running 1" spacers on my front axle for 6 years now without any concerns. they are spidertrax.

i ran 1.5 inch wheel spacer and i had a problem with the wheel bearing nuts backing off and i never had a problem till i got spacers,could be a coincidence i guess, or the extra stress

I have 1.5" spaces on my junk and have never had issues with them.  Tighten them to spec and use lock-tite