Long fleet bed interchangeable-1960/1966

[gmcbigbl]

Are all 1960/1966 long fleetside beds interchangeable and correct. I've got got a 1966 long fleet and have available a 1961 long fleet I'd like to put on with little or no modifications and have it look correct for the year.

[LT1 Burb]

The frames are different on the 61 trucks so the bottom rails are not just plug and play, it will require some modifications.

[LostMy65]

It'll look perfectly correct for the year.
But like LT1Burb stated; the mounting to the frame will need a little modification.
The frame rails are further apart on the 60-62 than they are on the 63-66.
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[Imperial Kustom]

Use the cross sills (cross braces) from the '66 bed on the '61 bed and it will then fit. Just hopefully alll the bolts don't give you too much trouble.

[bighunting]

It looks like gmcbigbl's question has been answered. I have a related question. Will the 60-62 cab fit without modification on the 63 frame? Are all the cab mounts in the right place? Will it look correct for the year? Thanks
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[jonzcustomshop]

same issue the rear mounts are in the same spot, but the front are different, check out the faq section for some pics