Hi Bryan.
Yeah, I think a trip with a tour would be super cool.
If you ever go to the plant you'll notice a silver chute that connects 2 buildings.
These cars were really being assembled in 2 separate assembly plants.
The first plant Fisher 'Body' made the 'Bodies' , H bodys and Van Bodies. Evrything that was welded up to become the car, was welded there. Right from Freshly stamped body and frame unit panels.
They did some more stuff to , but that gives you the idea.
Like Wendy's, they made them to pre-established orders. From Dealers and Customers.
So my theory then is.. they had a few different H07 configurations, to meet the needs of the final trim the car was going to get on the GM final assembly line.....once welded up it went through the 'chute' mentioned above.
This is where the bodies passed into the final assembly line to get either Buick Chevy Olds or Pontiac trim and associated Drivetrain.
This plant was the GM final assembly plant.
Back at the They may have been able to assemble most of the '07' hatchback assembly and stock pile them.(all exterior quarterpanels and dimensions were identical) Then as order's rolled in, the units could be selected for an order in rapid fashion, and receive the necessary final welds.. Be it an M, E, R, S, D, or T version. Body's went through multiple quality checks and could be held back, if one needed an adjustment here or there.
This explains how some of the body unit numbers can jump around, while the vin# only increases.
Then Fisher Painted, added Glass, and interior trim, as ordered then..
Then on to final assembly.
Things are done in a much more modular fashion these days.
The old assembly line has been replaced 3 times over. It would be cool to see if the original elpo paint dip equipement is still around.