I have the Edelbrock Performer with a 1" spacer between the upper and lower manifold and 70mm TB and Spacer. 30# injectors.
o man, that setup, I would say you can put down around 500hp EASY. keep that compression down and you will be ok. If I just put a set of heads and a mild cam in mine, I would have about 500, but the stock block can't take much more than 550 hp. Thats why I'm staying with the setup I have now as long as possible. very streetable.
But, I just got an '86 302 long block that I have a lot of things planned for. but we will see what happens...

and I would definalty go with with Vortech. Ez to install, and great power, and that blower wine is awesome at idle...
here is what it sounds like.....
http://media.putfile.com/My-Mustang10