Have put several but had to use the van front crossmember for the 55-59, pickup too narrow. Pickup fits 47 to 55 1st with a 1/2+ spacer. On the 55-59 the frame will need to be massaged a bit at the rear of the crossmember for clearence. You can use a rosebud and a BFH or just slit it and move it in so little that you can't even use a filler plate, just weld back together. In either case, wheels with custom backspacing are needed or the tires are out from under the fenders


Evan