Saltshaker...check out this thread and note my post with pic on idle problems with twin 4-barrels. May be of help:
Which carbs do I want for 2x4 MR?
Here's the 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....I seem to have idle issues after hard braking and hard acceleration.