I think this would work fine on a different wheel base. You just need to know how to weld.
I took my idea from Ray's and changed it slightly to do what I needed. I needed to reinforce my trailing arm connections and replace some rusted sections. I decided to chop out a portion of the trailing arm support. I actually welded my frame rails along the whole pinch weld below the rocker arm. Here's a link to my Frame rail build page:
The important part is joining the trailing arm support area to the reinforced area adjacent to the transmission crossmember. I like the idea of taking it all the way to the front frame rail so that's what I did. I also cut out the unibody support from the LCA mounts and made some of my own using the same 1 1/2 x 3 1/2 square steel tubing. This will give me more room for headers.