if the car is a factory turbo car it has to have the upgraded suspension no way would Buick let one roll out with the engine and run only narrow tires and smaller rear end etc.....
It could be possible that the car would not get the proper YA steering box....but that woudl be a screw up also.
I wrote a 400 plus page book on the turbo cars 1986-1987 versions....it does get complicated as Buick when they introduced the T-Type package in 1983 it went across five different models of Buick....the most valuable ones being the 1986 T-Types as the "turbo Regal" was technically called in 1987 it was called a Turbo-T reason for small metal T emblem.....
Then you got T-Tops.....so yes it can be confusing plus they made V8 examples in 1987 that had the "look" but not the turbo hood or turbo engine....this was to appease insurance companies for young drivers.....
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