Also modifying my A body clutch pedal. I am using instructions from december 2010 issue of mopar muscle magazine. Article is entitled "a clutching result"
This adds 3/4" pin to pin to set it at 6.0" increasing the pedal ratio for more complete clutch plate seperation while shifting. I believe the article stated superstock 4 speed cars had this done to them, however all other 67 to 76 A bodies otherwise all made due with a 5&1/4" pin to pin pedal setup.
The side that gets extended the 3/4" is the side the clutch linkage rod attaches to.
I still have to weld it up.
Matt