Please take a minute to tell me if my plan is correct or not

Ok so I have never done quarters so until I experience I'm a little intimidated by the process. My understanding is if I order these Body Components - Quarter Panel - Quarter Panels for my 1972 scamp I will want to place it over my exsisting quarter and mark. Then come in 2" all the way around and remove that material. This leaving me with just the outer edge of the quarter attached from factory spot welds. I will then drill out those spot welds including the ones hiding under and lead in the sail to fully remove the original piece. I then will make and inner wheel well repairs and place the new quarter on making new welds in place of the old factory welds. While ensuring proper allignment with doors and trunk. I hate doing things for the first time that are crucial. Because you always comprehend it so much better after ripping it apart. Please comment thank you