original engine/drivetrain would not bother me for this car, My gotta have it on any car is always more than original drivetrain, it's a QUALITY top notch, make ya drool over restoration.
If you can find one with original drivetrain and the above.. a BONUS!!
The 66 or 67 L-78 I am currently looking for must have original drivetrain, but the color specs don't matter., here we are just talking about dream car.