torque converter question.

[68cuda78]

I will probably sell the one in my car , its a 11 inch I believe. How do you measure the size of a converter I assume from where the ring gears meets the converter

 

[o1heavy]

Mad dart they built me a 9 1/2 , I got a real good feeling that this thing is going to run hard at the track , I suggest to just bit the bullet and spend the money, dynamic (Sean) told me that they would even adjust it if needed free of charge