Re: vacuum hose
I think it's 4 & 6mm hose. About 10ft or so of each (5ft more of 4mm if you do the vac ball in the passenger side fender). The biggest thing to do is fix up the vac lines for the turbo, they're 4mm and need to be ziptied to the fittings for security. Silicon hose would be great, but rubber is just fine too.
Check out this link if you haven't yet:
http://powertuneplus.com Look at the article "How to get your truck deep into the 13's" He lists the basics that MUST be covered before you go further.
GL
-P