I think I understand what you are saying

You want to convert from an A frame to a beam, and I have to say yes you can but it will involve cutting and welding and unless you really know what you are doing why bother. The A frame angles are from what I have seen a standard angle and you should be able if you really want to, bolt on a different coupler or get something like a Bulldog
http://www.bulldogproducts.net/content/ ... 020&part=0 which has greater articulation for off road.
If you are serious off roading and want an Oz Hitch or its like a plate can be welded on
http://ozhitch.com/gallery-2/your-hitches
