Y-Block Dual quad ECK manifold c/w 2 matching Holley 4000s, list 9510 # 1074-1 & 1074 2S. These are supposed to be matching   dual quads with the vacuum secondaries. (?) Item #280153905870  

Do your homework before bidding.  These are '55 carbs, no automatic chokes.  The chokes are on the manifold in '54-'55.  One is missing the secondary diaphragm.  The factory wires referred to is probably the safety wire on the screws that hold the booster venturi in.  If those screws fall out, they go right down the secondary throats.  I didn't see a manifold, ECK is the carb numbers, not a dual quad manifold number.

John