Edelbrock models 1405 versus 1406 carburetors

phista,i don't think so on the cover but it does have a real heavy spring on it just like the 800 eddy so when mashed quickly it wont compress the spring instead it push's fuel out now! im gonna post some pics & this stuff works great for tighter converters with 3.23 gears & a tiny motor (low air speed when hammered will require more raw fuel to pick its self up & make a crisp smooth transition to wot). Again cant say enough tune via wide band o2 gauge! it will squash out all guess work!