[67 Convertible]

I doubt the credit union will give you a loan on a car that doesn't exist at the dealer yet. I don't think they will give you a loan without the actual sales agreement in hand from the dealership. I doubt the dealership will give you an actual sales agreement on a vehile that is not in their possession yet.

I understand what you're trying to do, but I doubt any of it will work until the car actually arrives at the dealer and you have a real sales agreement in hand. There is no reason you couldn't get pre-approved at the CU for the amount, then just stop in and sign the paperwork and pick up your check the same day the car arrives.