Thats a wicked buggy there! I am currently re-working the rear suspention on a VW based sand rail. Converting from a swing axel to an IRS setup. I havent had much time to work on it so it has taken much longer than expected.
Take your time and build it right. A buddy to help with the work and fab work will be a big boost. Maybe you could build 2 of them at the same time?
Keep a progress report going on this one please