Make sure the 5th digit in the VIN# is an "M" which is the 440+6 engine. Write down the entire VIN# for my A12 database.
I agree with everyone above except for the leaf springs. I have Broadcast sheet documentation on many of the early build A12 cars where they were delivered with the standard Rallye suspension, 5 leafs per side. 99% of them have the Hemi suspension with 7 leafs on the passenger side though.