Need help with edelbrock 1406 carb

Way late to the party, but found this an interesting thread. I've been running Edelbrocks (1405, and now a 1905) on my LA360. The only problem I've ever had with it was vapor lock after I put headers on it. It started off with a 750 Edelbrock when I got the car, I forget the number, maybe a 1407. I swapped to a 1405 (600 cfm, manual choke). Got so much junk in the new filter and float bowls, I changed the gas tank. It's been spotless in the float bowls since. I've had the top of the carbs off a brazillion times, and never ripped or replaced a gasket. No leaks. But yes, you do have to be carefull with the screws, it would be easy to drop one in. And the friggin clips that hold the throttle rod and pump rod in place? They are a friggin joke. They're too small. I can barely see them, can hardly feel them with my fingers. I don't know how I haven't lost one yet, they've been removed a brazillion times too.

When I did install headers, I also welded in bungs on both collectors and run a wideband AFR gauge. The AFR gauge has been the single best thing I have ever done to the car. I'm not necessarily suggesting those who don't have one should add one. It's not the cheapest easiest thing to do. But, in the case of the OP's original problem, it would have been much clearer from the get go what the issue was. To me, it sounded like it stalled at idle due to getting too lean. Anyway, I won't guess, the OP seems to resolved the issue anyway. It would be nice to know what the problem was. Since adding the AFR gauge to my car, I have tuned tuned and tuned some more. My car now runs as close to running like it has EFI as a carb get.

Just FYI in case anyone wonders, I wound up adding an electric pump back near the tank, and continue to run a (new / replaced) mechanical pump (stock location). I added the electric pump to push fuel past the heat of the header, to stop the vapor lock. Because I'm running 2 pumps, I also added a pressure regulator and set it to 5.5 psi. I ONLY got vapor lock at the strip. And it happened consistently at about 7 seconds into the run. And the AFR gauge told the whole story. Without that AFR gauge, I would have just had to guess.

I don't know the facts about whether or not the float tabs could get bent due to fuel pressure. But my opinion is that up to 10 psi, I don't think the tabs would bend. Just my $0.02 worth, no expert on that, and I don't know the fact, just a guess.

OP, it would still be nice to hear from ya!