need new carbs for tunnel ram

hows it goin everyone, i have a 73 dart swinger with a 318 that i bought it supposevely has 340 heads a wild cam which i have no idea what is unfortunately, a weiand tunnel ram and it had 2 carter 500 cfm carbs ontop of which are toast, i know i dont have all the specs and such but i am getting new carbs and i was looking at these, which come with the weiand tunnel ram setup from summit, http://www.summitracing.com/parts/HLY-0-9776/?image=large now what my question really is what are the pros cons between these and regular 4 barrel carbs? thanks in advancee