Call up Dom (thumper carbs) and have him build you a custom dominator. Sell your current carb to help cover the cost.
I messed w/ an 8896 for a lil while and never got it to clean up.
I have an old 9375 that's better, but it is dead rich at cruising speed on the highway.
I have a Pro Systems 1200 cfm dominator on my hemi that's awesome. Been running it since 2006. Some people don't care for Pro Systems, but I've had good luck w/ them.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax