Very interesting m5extc......good thought.
I have a smiliar problem. Doesn't stall, but idle goes very low. Happens after hard braking, but comes back to normal in a second or two. BUT, it also happens after I return to idle from a WOT hard run and then it takes 15 to 20 seconds to come back on its own. In each case, and instead of waiting, a quick stab of throttle clears it out and it will idle perfectly immediately after that.
I have a 2x4 arrangment with the Holleys rotated 180 from a single Holley installation. Most of the vent whistles, baffles, etc, are meant for normal carb orientation, so may not help much for me. Personally I think the float levels need to be a tiny bit lower. I've got a couple of Holley sight glasses ordered as my previous attempt at this spilled a lot of fuel....chuckle.
Anyway, this is of interest and may also be the problem:
Here's a fuel slosh mod....check out figures 5 and 6 on pages 6 and 7:
http://www.holley.com/data/Products/...99R10268-4.pdf
And heres a site on doing the mod yourself:
http://classicbroncos.com/tech/offro...4-barrel-carbs
I have to try the slosh mod myself....after I try lower float levels first.