I have been reading the threads regarding swapping in an IROC Z XH gear or some people using the Cardone or Lares rebuilt. In the case of the Lares 972 box which allegedly has Z28 internals, that is not entirely true. I bet this is true with the A1 Cardone boxes also where people have swapped them in and not got the increased road "feel". The most important part to get that feel is the torsion bar or t-bar. The thicker in diameter it is, the more road feel you get. The t-bar thickness on a std 69 box is .175. The XH IROC box has a .210 bar. Lares just told me that they do not put a .210 t-bar in when they put the Z28 components in a 972 box! I am willing to bet that happens with Cardone also and why it is a crap shoot as to what steering manners you wind up with. Just thought you guys who are plannng on doing the swap might want to know. I am either going to find a used XH box or (shudder) pay the exorbitant price for a Lee 670 box depending on my luck finding a good used IROC box.