What you lose when installing the 3.55 gears on an otherwise stock AD, is engine braking. Of course you still get engine braking, but the difference can bite you coming down the back side of steep hills and mountains. Don't ask how I know.
Matthew 6:33
1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com
