i have just finished doing this . my 39 suburban is on a frame from the 50's . not sure of the year the motor is a later Maybe '70 250 .the hard part was switching the crossmember to accomodate the bell housing difference.a lot of rivets to chisel grind and beat off .i was fortunate to have this come out of a 55 truck that had front side mount adapters made to attach to the motor side mounts .a sort of sideways u-shaped piece of metal bolted to the frame bolted top and bottom .home made but they work. the clutch worked the same . in my truck i had to mount the radiator way up in the front directly behind the grill but this was necessary regardless because of the older body length.
