tomc is correct, the 58-9 frame rails are 2" longer than the 5-7 -
like this, otherwise the same from 55.2 -59 - a Cameo is just a 3100 pickup with fiberglas pasted on .... and as said, the 58 frame will have a vin stamped near the steering box that won't match the 55 title .... where on the Island are you, I might be able to help some from the Comox Valley
Bill