Did you read this whole thread?
If you did, you will see I outlined what I did with upper bopdy stuff. You don't wanna go to heavy or too hard on the upper body, stuff idea is to maintain to some extent - but you will get gains from all the squatting anyway.
When you specialise in one exercise and go high volume and frequency, you have to back off elsewhere or else your not gonna recover.
I suggest you workout 3 times a week if you decide to do it. And just add a push, pull and shoulders day. Not much need to do abs as they will get fried from the squatting.
Oh yeah its pretty damn tough

Rest at least 3 mins between each set, 4-5 mins is about right, and sometimes more if your starting to tire. Avoid any pump if you can in your legs.
remeber - never go to failure