... I didnt really get what you said about the speed thing... But yes, all you need is longer bolts and washers to shim out the control arm to correct your camber.
The bolts you need are: Highest grade 10 x 1.25 45mm , and about 3 washers per bolt. So you need 4 bolts and 12 washers that fit properly on the bolts. You can shim out the rear with the bolts you have, but I would just spend 3$'s and get longer bolts so you dont have to worry about how much thread is actualy holding the arm in place, because when you shim it out using the washers, you have less bolt to thread into the hole. And you dont want them to snap when you hit a bump on the freeway doing 60mph ...