I have a 99 chevy 1 ton cc dually with 4.10,4l80,a454 bb. I was thinking about pulling this truck stock class until I was reading some post on here and everyone was saying that duallies are hard on the rearends but they were talking about dmaxes and my truck is stock bb and doesn't create no where nere the power they do. Will i be all right pulling this?

Yes you'll be fine. As long as you realize that everytime you back upto the sled you're taking a "risk" that could possibly break your truck, shorten the life of parts on your truck, and it could be costly to fix. The only 100% gaurantee on how not break is to not pull.

But like you said you have no where near the same HP and TQ as most of the diesels.