Stop in for a cup of coffee

Made a before and after comparison of the kickdown linkage bellcrank.
The arc for transmission rod is practically the same as before - maybe 1/16 different at most.
Then I decided to compare with the linkage in the boxes. You know, the boxes. Some parts from the '67 225 with 904 (assuming it was the origial linkage) and other stuff that came from junkyards.
All I can say for sure is the 904s got different linkage and transmission levers.
And, the linkage set I bought when switching to the dual plane intake isn't really for an A-body.
How much does it make a difference? Not sure?
There's some flareup when manually shifting in certain conditions...
That's how this all started.