little tip, scrap the aluminium pivot balls. From what I've heard they're useless. Stick to the stock stainless steel ones or go for the 6AL4V titanim ones.
The Integy bulkhead braces come as a pair(meant for one end of the truck, but I split them up myself). I agree on the pillow balls. the stockers are strong and cheap. If you upgrade, go with the RDL Ti. Also, you mentioned aluminum turnbuckles:I would stick with the stockers here as well, or upgrade to ti(which I can get for you).
Welcome to the forums, too, by the way!