[71blksuper4x4]

Originally Posted by lolife99

I actually like the rear of the trim slightly higher,... so it DOES run in a straight line. To me it looks better.

I would suggest mounting the bed on the truck, with all body lines shimmed to your liking.
Then lay out the trim.
I've seen some trucks, where the trim was added to the bed while it was off the truck,... and looked terrible when installed.
I know of a couple reputable truck builders that raise the rear of the upper trim to make it flow better "visually".

I know what you mean Keith. It may look better from a side shot, but where it ends up higher in the rear, that’s where the straight line formula doesn’t sit right by the taillight trim. To be correct from factory though, it does have a subtle crown to match the body line crown.