Either I am confused or Eckler's is. I need a transmission mount cross member for a '56 convertible.
Eckler's has two listed. They say one is for Turbo Hydra-Matic 200, 400 but I thought these were different lengths. The other is for TH700R4, TH350 Or 4L60E but I thought these were different lengths.

I thought the 350 and 200 were the same length. And I thought the the 400 and the 700R4 were the same length. So I don't know if I am confused. Can someone straighten me out. I plan to install a 700R4.