Time for an update.
I salvaged the front suspension stop brackets and the suspension pot support tubes from the original frame. I cut everything apart using a 4 1/2″ angle grinder and many cutting wheels. If you are going to do this project, buy the cutting disks in bulk. You will need about a dozen of them.
Here is what is left of the old frame.
Here are the new rails with the suspension cross member brackets welded to them.
Here is a view of the front suspension cross member bracket with the salvaged suspension stop. This bracket is cut from a piece of 2″ x 4″ x.125″ rectangular tube and the spacers are made from 3/4″ square tube.
And here is a view of the rear suspension cross member bracket.
The next step is recovery of the suspension tubes, then welding them and the new cross-members into place.