In the pictures below I’m fitting the rear quarter panels. I’ve aligned the panels with the door skin and they are fastened temporarily to the body with clecos and to the bottom support bracket with bolts. The bottom support bracket is adjustable which is visible in the third picture.

I bought adjustable body braces for the front and rear. One is visible on the front of the car in the bottom picture. The curve of the fiberglass panels is not symmetrical between the right and left sides but the braces push or pull the fiberglass into position. Interestingly I found that after holding the panels in position for a few weeks the fiberglass takes the new shape and doesn’t flex back after the braces are removed.