The standard without cross member replaces the stock torque arm, if you go with torque arm and cross member there is one listed for the 200-4-R for both standard and Pro. I have the Spohn chrome moly Pro torque arm and cross member but haven't installed them yet. Unless you are planing on breaking into the 9's or faster the standard torque arm will be fine...or if you don't mind spending the additional money.
Another option is to box in the stock torque arm and replace the trans/cross member and trans/torque arm mount with poly mounts...and save yourself a bunch of $'s.
I think sub frame connectors, good lower control arms, panhard bar and good quality rear drag shocks is way more important than replacing the factory torque arm. If you haven't addressed them yet I'd start there and then decide if you need/want the torque arm.
My car had stock cross member, torque arm, rear springs, "no" subframe connectors (I do have them just not installed yet and have been lucky), dead front struts a with front sway bar installed and TRZ dbl adj rear control arms, adj. UMI panhard bar, and Strange dbl adj rear drag shocks. I launched the car at 16 psi off the transbrake and cut consistent 1.48 60' with MT DR's and the car lifted the front tires 6"-10" perfectly flat and went straight as an arrow.
