AFAIK, the difference is in the Spindles and Disk set up.
If you went to Drum Brakes (beetle) I think that you gain about 1" total.
The tubes are the same...
I need a Ghia beam to build the 3.5" narrowed adjustable I have that is just tubes and springs.
I want to go with all new steering box tie rod ends and the adjustable Ball Joints that I have.
With my schedule the beam will take a while to build and I do not want the ghia to be dead in the water that long...
KC