[Mr70]

I've found a few in junkyards,but nothing recently.
There were 3 different charcoal cannister designs during 1970.
*One for the single & two bbl. carbs.-3 nipple.
*One for the four bbl. Quadra-jet carb.-3 nipple.
*One for the four bbl.Holley carb.-4 nipple.
The Holleys needed the 4 nipple charcoal cannister because their primary fuel bowl is vented back into the cannister through a seperate line.
The 70 Z/28 used a Holley,as did the L-78,LS-6 engines.