Kog, wasn't saying disconnect the vacuum advance and leave it at that, just commenting that sometimes vacuum advance on RB engines may at times advance too fast and cause pinging if it advances too quickly.
Cris, you need to get ahold of a referee or go online to see what your smog laws are. Some states will allow a change of carb, others will not. Some will allow a tail sniff that sniffs cleaner than limits set for a specific vehicle or engine and could care less what is under the hood, and here in California, numbers on EGR, catalytic converters, vacuum hose routing, you name it, if it isn't CAFE approved, you fail. In other words, find out what you can and cannot have different than stock before buying or changing a whole lot of stuff, it's the safe way to do it.
The Six pack single 350cfm 2bbl carb would not go onto your 440 by itself without a 4bbl to 2bbl adapter plate, to which there was not a single RB ( 413/426 wedge/440 that ever had a 2bbl intake manifold), it is just too small a carb to run that large a vehicle to boot.
See if the smog rules allow the Holley carb, which they might.
Found this at Summit Racing to connect 5/8 hose from Breather on the valve cover to inside Edelbrock clamshell air filter that I have. Emissions test to come. Expenditures BEFORE first failed test don't count in my $715 allotment toward a wavier....
Can this breather on the valve cover be cleaned or replaced? Trying to find part #'s for 440 V-8 from Dodge build F40 or M-400 chassis MB400 in 1977... Breather, PCV valve, air filter housing if I need pre-heat hose??? Vapor from gas tank (I see broken hose), locking gas cap (pressurized???), charcoal filter, other emissions related parts on 1977 Mopar V-8 440cid built into Mallard Motorhome.
The breather can be cleaned with solvent if it is dirty. The pre-heat hose should be identified needed by a piece of sheetmetal attached to the driver side exhaust manifold with a round hose top and the air cleaner having an upside down hat to connect the two. The air cleaner will have a vacuum operated door at the location to control its function interacting with the choke mechanism. If a charcoal filter and evap hose is needed, there would be a smaller tube running alongside the fuel line itself. If it isn't there, I doubt it was removed. Look for telltale signs of a charcoal canister attached to somewhere under the hood area, if it was needed or removed.