why not find the links to the site, becauase you will only need to 301 the urls with extenal links. let teh rest 404. i use Bing WMT as it has a most complete collection IMO. they also export to a csv

Robots.txt, you can remove from google to hurry it up, using WMT, but first you need to block them in robots.txt

User-agent: *
Disallow:

User-agent: Google
Disallow: /bad

i would think that most bots and modern browser all ise http 1.1 by now, but I am sure there are some things out there that still use 1.0. i seem to remember that some phones use 1.0, old windows media players
i would try to block them anothr way just to be sure. maybe rogerbot users 1.0
it sems a bit over kill
They may just change to 1.1

too many according to google. make of it what you will, does not look like it is for any technial reason anyymore, but obviously there is a limit to how much of page they will crawl.
http://www.mattcutts.com/blog/how-many-links-per-page/

You see how page rank flows, having a lot of links on your home page works to your advantage. Using numbers from Googles original algo,
Assuming every page starts with 1PR, a page passes %85 of its link juice, so if you have 100 links that’s 0.0085 each. To 100 internal pages, making them 1. 0085each , now they all pass back 85% that’s 0.857225 each, x 100 = 85.7225 back to your home page, now we do the sums all over again and again till they numbers stay static. Now this calculation relies on the internal pages having no other links, so you are unlikely to get figures as good as this, but you get the idea.
See link for better explanation.
http://www.webworkshop.net/pagerank.html check out calculator
Remember don’t stuff up your linking stuckture for the users just for the sake of page rank.

I see it as like a golf swing after a lesson, if you try to do what you just learnt too much, you will get all stiff and un-natural, it’s better to swing naturally with what you have learnt in the back of your head.

Wel how many do you have.

A quick way of checking is with IE, press F12, go to view menu, then link report

Well have a look if you can move a few out, it is good to link to as many pages as you can from the home page for the sake of PR flow. but not go over the limit, Some say the limit is 100, some say 150