modernizing the revell pro sportsman chassis

[tubbs]

ok, as modeling time gets less and less around my house and maybe I am tackling too big of a project here, but I would like to know what it would take to upgrade the pro sportsman chassis to a legal chassis of todays cars. pictures and web sites are a plus. I enjoy tackling scratch built ones, but they are way too time consuming (and most of the time not too accurate and just plain wrong.) thanks in advance for any help.

my apologies if this has been covered, I looked for it with no success.