Turbo Rocket-Oldsmobile COPO?

[The Dude]

Explain the process of how they took a convertible body and welded on a Buick roof. It doesnt make sense to me, but I dont know much about these cars. What I do know is GM quarter panels extend to the top of the C pillar with roof skins welded over the inner roof structure. Everything was welded together on a jig. Why would Olds weld together a complete vert body THEN add a roof? Id think Fisher body already had the capacity to build the car, so why was it removed from the regular line to add a roof? Im just trying to understand the process, thanks.

[69SSZL1]

Good question.
The 1962-63 GM Y body quarter panels did not go into the roof at all. You can see the roof seam extend below the top on the quarter panel when you look in the trunk. That is the purpose of the chrome molding along the bottom of the roof on all Skylarks, Cutlass, etc GM Y bodies from those years, is to hide the seam.
It would make sense that it was pulled off the Fisher assembly line, since Fisher did the bodies. The body number for these cars is 3147 is on the trim tag.