996 vs bug back end

[speedy]

anybody know the disk face to disk face measurements, the reason is that there have been several 996 complete rear suspension setups on ebay for between 400 and 600 pounds , i am putting a full internal cage in my car next year and was going to tie in the gearbox mounts and do away with the frame horns for easy porsche gbox addition , the thing is by the time you have paid out for the rose plates and rear shocks etc you begin to wonder weather it would be more cost effective and give a far superior ride to make a suspension jig to locate the new 996 suspension and weld that in to the cage as well , anyway i have 2" over wings so probably have about 150-180mm of additional trackwidth over a standard bug to play with without to many probs .
any ideas cheers jon