Steve, "dizzy" gear is the "distributor" gear. Gotta watch some of the slang, or you might go awry. In this case, SERIOUSLY awry! edit--Damn! I didn't read page 2 before I made this post. Sorry
http://tech.maverickgrabber.com Late Model 5.0L article should get you started. I got a 1985 Manual tranny Mustang distributor remanned for about 90 bucks; it has the roller cam gear and is setup for carb. Duraspark already.