WOW what great information. Now you got me going. So if I use my little pneumatic body saw and use the flange for a guide that puts me about 3/4" out from flange. If I make the same cut on the doner fender and them whatever works out to two inches make another cut out to whatever is 2 inches then the inside edge should line up? The outside edge radius would be wrong? Should that be sliced or something so they mate up? Can that be done on a planishing hammer? I'm not sure what they do but I'm sure I need one. I think 2" would look pretty cool. I'm just trying to get this to hook-up. I'll be running a blown 292.