[collins10672]

the cab mounts are different on the 60-62 trucks than the 63-66's.the front cab mount is different and bolts in the floorpan in a different spot on the earlier trucks and vise versa on the later trucks.the 67-72 frames are the same as the 63-66's,but i am not sure about cab mount locations on them.the 73-87 frames have a different wheelbase,the 60-72 short beds are 115" and the 73-87 short beds are 117.5".so you can use a 60-62 frame and not change cab mounts but would probably want to change front suspension.if you use 63-66 frame with the 61 cab you will get the coil spring front end,but will have to change cab mounts.you could use front cab mounts out of a 60-62 frame and mount them on the 63-66 or use the 63-66 factory cab mounts,but you will have to modify your floorpans on the 61 cab.hope this helps