I have no doubt that the cost of the pot metal part was a variable.
But I'm just spit-balling...
I have never read that anyone share anything of substance which would indicate why there was so much early production ect parts that differ from the regular production parts;
EG: early 1970 model year shifter knobs - they ALL differ from the regular production parts;
early 1970 automatic (console shift) = simulated wood knob
production 1970 automatic (console shift) = simulated leather knob
early 1970 manual = simulated leather with red insert
production 1970 manual = oversized black ball
Is it possible that PMD did a broad review of supplier/contracts when J. McDonald replaced J. DeLorean as general manager - the "1970+" cars were the first totally new vehicle built under his leadership, and i have read that he was very keen to save money (I believe this was cited as to why the still born RAV project ended up the way it did - and that he was also behind nearly killing the SD455).
Forget the parts that changed because the final designs were not quite nailed down - just early production parts vs the common production parts;
If the intent was always to make the resin panel, why did anyone tool up and supply PMD with the pot metal parts!?
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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