Cast datums for wheelbase tuning

1. A method comprising:

providing a first design or a first reusable casting die for producing a vehicle rear rail having multiple pre-determined datum features;

producing a first vehicle rear rail and a second vehicle rear rail from the first design or the first reusable casting die;

wherein the first vehicle rear rail and the second vehicle rear rail are identical;

using the first vehicle rear rail to make a first vehicle having a first wheelbase and using the second vehicle rear rail to make a second vehicle having a second wheelbase;

wherein the second wheelbase is longer than the first wheelbase;

wherein at least one of the multiple pre-determined datum features engage a pin on a pallet; and

wherein the multiple pre-determined datum features include a front hole and a rear hole.

2. A method as set forth in claim 1 further comprising forming the rear rail by a high pressure die casting process so that the rear rail is a rear rail casting.

3. A method as set forth in claim 1 wherein the front hole and the rear hole are each constructed and arranged to engage a pin on a pallet.

4. A method as set forth in claim 3 wherein the front hole is a datum point for a long wheelbase and wherein the rear hole is a datum point for a short wheelbase.

5. A method as set forth in claim 4 further comprising engaging a pin on a pallet in one of the front hole or rear hole.

6. A method as set forth in claim 5 further comprising attaching the pallet to a geo-pallet conveyor system.