8" vs. 9" convertor

The torque Multipication/Stall Ratio tends to be much better on the
8 inch vs the 9 inch although the stall speed is similar!
We often test a 1/2 dozen every time we build a new engine on our Stockers/SS
to find the last hundred in 60 ft. It is an expensive tedious game at National Level.
My shop is full of converters as you just have to keep testing.
Beware of the new expensive 7 inch converter - they will not fall out of a tree for us!