haven't got a quote yet, heading into town in a bit, but I have sorted out which one came from where.
the two on the outsides are from the '81 diesel (front and rear - fixed mount) and the middle one with the bump stops came from the '79 Gasser parts car (rear - adjustable mount). I'm sure you know but they are interchangeable from gas to diesel.
the diesel ones are ~25lbs each (not including packaging) and measure ~58"x15"x6" (front one) and ~56"x15"x6" (rear one). Mounting widths are 36 1/2" (front) and 39 1/2" (rear).
the gas one is ~35lbs (not including packaging) and measures ~55"x16"x8". Mounting width should also be 39 1/2" but it's hard to tell w/ the swivel mounts (I measured 39" eyeballing it).
i'll post tonight what I find on shipping prices.