Just following up on my service experience at Elco Chevrolet Cadillac in St. Louis so other V owners will have something to go on.
Overall I definitely had good service while I was there, from the mechanic that cvettr recommended to the service advisor everything went well. They were helpful and knowledgeable, although they had my car for a couple of weeks waiting on a new differential from the factory. I was traveling during the time, but they were good about responding to my constant request for status updates...
If anyone is looking for a good V/Vette mechanic let me know (or PM cvettr) for the name.
The only downside to the whole experience is that they stored my car outside for two weeks while I was traveling, it was just washed when I brought it in and when I got it back it was dirty and covered in bird poop...
If anyone would like more details feel free to ask.
Thanks,
Dan