5th scale on road car based on 1/8 buggy parts

[lincpimp]

I have seen stuff like this done, but would like to condese the info into one thread.

Making an on road chassis is pretty easy. Flat al sheet with some braces or a backbone, etc.

Using buggy length arms, especially some of the older short arms setups would be nice. Same with diffs, and even the center drive/diff. Longer center driveshafts would be required. Steering would be easy too.

Now, I am not sure on dimensions. Width, length and wheelbase would be nice for some bodies that some of you may have.

Now I would really like to know how the 1/5 scale wheels mount. I have heard they have 18mm square drives instead of a hex shaped drive. Any adapters or ideas on how to get 5th scale wheels on a buggy style, 8mm, axle?

Anything else would be helpful too.