i have an eldebrock tunnel ram for a big block it has two tops with it,one is a single carb top(4150 bolt pattern) and the other is a dual dominator top that has been re drilled(not by me)to fit 4150 carbs with a spacer plate that i have,i also have 2 600 holley carbs with it that are in pieces(i think they are all there but no sure)ill take $300 shipped if your interested.ill see if i can get some pics if your are interested.