After a lot of listening and a lot of looking I decided to go with the Demon 98s and their matching linkage and fuel log for the 312 going into the Crown Victoria.Here thay are mocked up on the Edelbrock 573 intake, (less the fuel rail).
I looked at every other type of carburetor avialable for this application including trying to adapt webbers or Rochester 2Gs and this seemed like the way to go. A lot of it had to do with the feedback from others using these carbs.
Hopefully I can have the engine done in the next 8-10 weeks and get it on the dyno to see how they work out.