I have the Edelbrock system on my smallblock. I like it pretty well. It is adjustable to engine mods, and looks cool underhood (unlike 5.0 systems). The system is very complete. The only problem is the ports get real small right where they reach the heads, but since the manifold is aluminum, it should be easy to fix. I was in a hurry to get my car on the road, so I haven't done this yet. It is also alot more expensive than a carb.
I installed the MassFlo system on my car and am really happy with the product and the results. There are several photos of the install on my CarDomain pages. Do a search here, I've posted several times about this product. I chose it mainly for the vintage look it has over the swap EFI installs, in many cases people are not aware that is is injected.