OpenGambit
Banned
If I had to hazard a guess, they aren't incredibly clueless..they just don't care that much. They do this stuff all day long..your baby is just another vehicle to them. They don't want to tell you anything that can come back on them or mislead you. I suggest you do get it in writing..and I also suspect that they'll say you can't do anything other than stock if you insist on getting it in writing.
They would not give it to you in writing, and even if they do, I wouldn't think thats worth anything. Almost all the dealer contracts and warranty has a statement to the effect that the dealer isn't allowed to say anything thats inconsistant with the warranty and any statement to that effect can not be relied upon by the consumer.
Therefore, it doesn't matter what the dealer says, you can't hold that against the manufacturer.