727 [ Planetary Info ] Needed

Hello, I just recently purchased a 1974 Imperial with low miles [ 440-727 & Dana 60 with disk brakes ] for $750.00 , my plans are to pull entire drivetrain and scrap the whole car minus front disk brake set-up all these parts to be used on my 70 Duster . Can someone please tell me if my 727 would likely have the 4 gear front & rear planetarys I have seen this in 1 Ton RV 727,s just curious I know I can tear it down but want to learn about the 727 in general,, thankyou Chris