4-speed gear set (3.09 first)
Yup - somewhere around 73 there was a 3:09 first, 1:1 4th gearset in an iron case 4 speed. I had one in my 408 Dart sport, with the 3:55 rear it pulled great through 1st!
Here is the cluster gear, looks like it was the same piece as the early 4 speeds used.
http://www.brewersperformance.com/proddetail.asp?prod=CG309R