well did a vin search and it comes back as a 49 state model no metion of CA or high alt .. odd..
However cant find any speek of this final gear in parts lists or any how tos .. but sounds simple enough , may have to go under the car to see what up under there and see if i can getto this magic panel on the transmission
Then the next step to find new gears..
The tire option is still there but it will raise the car up a inch or so.. that could actually be beneficial with these long nose and tail sections..lol