To give you an idea, both Edelbrock and Holley have recipes for building high performance engines. You can do a lot worse than following these recipes since they are lab tested. I recollect these are on their web sites.
http://www.holley.com/HiOctn/ProdLine/Avenger.html
http://www.edelbrock.com/automotive/index.html
For Edelbrock press "Power Package Concept" then see Edelbrock's quick reference Power Package Guide for matching components.
Dallas Mustang is a classic parts vendor, not a speed shop.