Here is the Boise Spring Works page that shows their upgrade kit being installed on a Tundra.
https://d3ciwvs59ifrt8.cloudfront.n...5604/846b6798-5dcd-463b-bcb5-5b57879e4f32.pdf
If you really are that light, you'll hardly notice the weight. You also won't need much boost at all to keep the rear end from sagging. If money is tight you may want to leave it stock until you get it loaded and try it out some.
Skidplates... I bought an aluminum RCI on BF sale... then I read all the reports of the aluminum ones breaking easily! Go with steel if you get one. Changing the oil with the stock plate is really annoying as you have to remove it. The RCI and most have aftermarket skidplates have a removable plate for accessing the filter, but it's still more work and mess than any vehicle I've owned...
