Holley or Edelbrock carb

ok ...i still cant decide....
1)i hear the holley will give you about 20 more hp. is this true.
2)I dont want to tune this thing all the time, but I want the preformance.


The other thing is....Is the enduro shine or the shiney(holley) worth the price difference?

I want the carb to look good sittin up there with little or no maintenance at keeping it that way.

Heres my setup so far
68 318
eddy preformer intake
Carb to be 600-650 (650 being the AVS, is it better?)
comp cam kit k20-222-3
8 3/4 with 3.23


not to much done but thats what I have or will have