That is a Holley style carb. Whatever you decide on make sure a Chrysler kick down / throttle linkage adapter is available, for ease of installation. I know Edelbrock has one available for the Thunder Series AVS and 600 Series AFB models. You can also use the stock steel fuel line with an Edelbrock. Check Summit Racing's site.
http://m.summitracing.com/parts/edl-1843http://m.summitracing.com/parts/edl-1805And I've read some good things about the Demon-
http://m.summitracing.com/parts/dem-1901
