I have an RBL "Lil Rocker" that I had welded to the frame. Dodge has retreated from their position of no welding and their engineering bulletin sent to my RV dealer stated the following:
"Prior to welding, the following must be done:
1. Avoid welding near the fuel tank (duh), fuel and brake lines or other components that may be damaged by the heat of welding. if it is necessary to weld near these areas, use wet cloths to cover these components. If it is necessary to remove the fel tank, lines or other componetns, do it in accordance with applicableservice manual procedure;
2. Components near the welding area which could be damaged by excessive heat must be removed or adequately shielded;
3. Disconnect the batteries;
4. Precautionary measures should be used to prevent electrical system components or wiring damages.
5. Frame e-coating must be removed from the welding and sorrounding area.
Use proper welding techniques to avoid stress risers that may adversely affect frame performance. "
Please note that this came from Dodge Truck Engineering Bulletin No. 21. There are also a long list of procedures for drilling. You may want to get a copy of the bulletin from your Dodge Dealer to take to your installer. Bottom line, find a good hitch and installer and make sure they follow the bulletin guidelines. My Lil Rocker is great as it was fairly inexpensive, handles up to 15K and is easy to take in and out (bad back) when I want to haul bark dust, dump loads, etc. Just a couple of flat rails left when you take it out which I cover with a couple of pieces of plywood when hauling stuff. Best of luck with your install.