I did the light swap about ~20 years ago and I cut the rear section off of a GTO, they were not that expensive then. I removed the whole rear light mounting section on the Zand then grafted the GTO section, flairing it into the body without disrupting the outer lines. it was a lot of work, but turned out nice. The car also had blanked out and smoothed headlights with 200sx headlights in the grill
I'll look for pictures, and post them if I can, that's a dozen moves and a divorce ago.