Carb choice

Will try again
On th 65 barracuda I am restoring the carb is really in bad shape. I have a brand new Holley 600 in the garage and would like to us that on the 273 hipo manifold but nothing lines up. I do have an edelbrock small block manifold also but not sure if that will Fit the 273. I am not sure about an adapter plate or not. Any help would be appreciated Thanx Frank