...unfortunately, door panels aren't a simple swap-out, thanks to options; manual/power windows, power door locks, outside mirror, possibly different arm rests. You need to cut/punch correct openings from pre-scored backing. And then there's possible misalignment of openings and even clip locations. Carefully measure every location from old panels before making cuts/holes and transferring any trim...
PUI are not as high quality as legendary. I’ve installed both, and legendary panels virtually snap in place.
Order from Todd Miller, he carries legendary interiors. Todd will make sure your interior is squared away 100%. We use and sell the Legendary Brand Interior Products because we feel they’re the best in the business! The only downside is the wait time and you have to pay in full to order your interior items. StageWonRestoration.com & DieCastMuscleCars.com – Factory Fast (stage1restoration.com)
"butcher paper" is great for making templates from the actual door. Heavy enough to work with but easy to cut to get it flat and locate where holes need to be. Old door cards, if you have them are also helpful.