Lilian-
There's a weekly TV show here called Muscle Car. Recently they did an episode where they installed the 71 Cuda gills onto a B'Cuda fendor.
Now some good news/bad news. The bad news is that even though I can find the episode on their web site, but I can't get it to play. Here's the link:
http://www.powerblocktv.com/site3/index.php/musclecar-episodes?ep_num=MC2009-09&ep_sea=0901The episode is called: Project Street Fighter Body Panels & Exhaust
Originally aired on: November 22, 2009
Episode number is: MC2009-09
I also looked on You Tube, but no luck.
The good news, having watched the episode, the install process looks very straight forward/easy.
The biggest tip from the show was that they cut the template smaller, thus, not having to remove as much metel around the perimeter.
Good luck, and please keep us posted with the progress. Is this one of those projects on my to-do list.