Well we have two projects going on in the shop that getting very similar frames. We bent up the rails and then layed out all the suspension pick up points in Soildworks and cut out the plates on the waterjet. After we did that we made all the slotted gusset plates to go inbetween the frame in Solidworks and then waterjet them also.
We are updating our website currently if you would like to see more.
www.ironworksspeedandkustom.com
Rodger