The 3 65 Ive had all had 10 inch rears.The one I have now was BB 4 speed.Bought the car in69.Now has 69 RT rear.It has 11 2 1/2 drums rears.Just ordered new shoes and cylinders etc from Rockauto for it.The old rear with the 10s we used drums on my kids 80 Truck the housing went under hi 62 300 and used the 69 C body drums backing plates etc..Drums from say a 69 Rt should fit.Rocky
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Chrysler Firepower