Thanks! I just tried a dummy booking again with National YYZ and it seems like only GXAR and SYMR shows up (they call it American Muscle Car) and not Premium Sports. For YVR, none of it shows up even though I know Enterprise YVR has GXAR and National/Enterprise YVR have Challengers. I might try it out this summer assuming prices are decently reasonable (and the fact that I have to fork out like $40-50per day for CDW since my credit card insurance only goes up to 65K MRSP).

I am kind of curious just judging by how my past rentals have been with National/Enterprise, but it seems like they don't actually check/assign a car to you until like the afternoon before for non-aisle locations. I always thought the computer auto assigned it and at the time of booking the computer program already knows its present inventory for each car class but it seems like in reality it is a bit more of let's see what cars we will have the day before and find a car at or above your reserved class. I have gotten some nice upgrades because of this though because the online booking system lets you book cars that are not available.