1952 series 62 4 dr front seat dis-assembly

[Technician!]

I want to dis-assemble my front seat to do some upholstery repair, as well as install front lap belts. The seat cushion, seat back, and frame seem to be an integral unit.  Anyone have any experience doing this?  As well, any direction on installing seat belts in this model would be helpful.
I have built several "street rods" and am experienced in retrofitting seat belts.  The ones I built, however, the seat cushion was removable from the base....the 52 is not.
Thanks in advance!

Steve

[Technician!]

Does anyone have a master parts list for this year with exploded parts views of the front seat?