TCI's Pro Super kit is the best I've used, for easyness. they do include good instructions, and the kit is good enough for a serious 350 on pump gas. If you're wanting to add nitrous, the Hughes kit is better, but doesn't come with much in the way of paperwork. You can get these from
www.summitracing.com There are a few special tools required, but if you have a welder and a hacksaw, you can make the odd ones. Snap ring pliers aren't something you make yourself, but they're not much $, even if you do end up having to buy your own.