Metric Wide Setup?

Hello, I am new to the forum but have read alot of the topics on here and they are great.  I have a question of my own.  OK, I race IMCA street stock and I am trying a wider setup on my monte carlo (1984) and I am putting the 67-73 Nova lower A-Arms on, with the full size spindles that accept the 11" Rotors, and the 58-65 impala upper control arms.  Also putting tall ball joints in for roll center.  Herein lies my question.  The track has now allowed tubular uppers and weight jacks.  I was really hoping someone could help me out with which tubular a arms i should get and the length since i am using the longer lower a arms.  Cant use adjustable uppers tho.  I know this set up was using on the Jet modifieds i believe.  Info would be greatly appreciated.  thanks. Ryan