I there isn't any difference in the crossmembers...only control arms, ball joints, etc...
I'm nearly 99.9% certain of this.
watahyahknow
+1y
in my case they converted the stock strongarms intoo one ton by putting bigger cups on the bottom a arm for the balljoints the top ones are the same dunno if the crossmembers themselves differ they might be stronger around the bottom hingepoints for the a arm