9" Coan - R021444 Max Performance - approx 3800-4000 rpm stall.. Was used behind my 72 GS 464 ci EC $400 4.30 Ring and Pinion-- EC was also used in the above car (12 bolt) ---$100 bdedrick@wideopenwest.com
Yes I did.. My first impression was that it felt very loose on the street in normal street driving and a much different feel than I was accustomed to with my 70 GS with an ATI 10" 3500rpm stall. I eventually removed the Coan and installed an ATI 3500 in my 72 GS.