Does anyone have a 1979 shop manual listing the 9" axles available that model year? I need to confirm what Ford installed in my Ranchero so that I can determine what speedo drive and driven gears to use in the C4, since the Grand Marquis originally had a 3.08 ratio axle. The ones that were in the original FMX went with the trans when I sold it, the metal axle tag shows a 2.47 ratio, and as far as I've been able to determine, the pumpkin's never been removed.