how to block sand this.

[blazer2007]

I know is not a truck but you guys helped me alot with good info on fixing the quarter panel on this thing.Is a 67 belverdere and with all the curves I,m find ing a hard time getting it straight. The trouble is above the wheel well it convex s the length of the quarter. It,s not a perfect quarter to begin with and I don,t expect to get it perfect but I,m trying. I end up with one section looking good but can see flaws in the body contours matching up along the lenght of the quarter. I don,t see how a long board would help with the convex shape. Pics are not my car. The bottom half is good but the top section looks terrible when outside and wet.