Like many ZL1s, most Z16s don't have the original engine and/or drivetrain. Also like the ZL1, it doesn't make them any less collectable. The Z16 has an incredible number of special, unique chassis parts. Like any desirable, valuable car, ANY legit Z16 is worth restoring - I hope we don't get into the "replace the handle, replace the bit - is the axe still original" debate again......
Dave