Todd,
your post got me curious of what the gains would be. I checked Edelbrock site and found some info on their heads ( I'm sure that you are probably aware of the specs). I found this info on a general search that was pretty interesting (at least it was to me)
http://www.bob2000.com/frd2.htm
note the sizes of the ports on the stock vs. Edelbrock. I 'm not sure that the intake and heads even match however, the size compared to the stock is definately smaller. I would think that the optimum would be to have larger matched ports intake to head and larger exhaust ports again matched to the headers. Better flow volume in and out should equal more power.
just my thoughts,
Mike 'monster'