Only modifications i had to make to the fenders i bought from chis where the top edge is curved, your gonna have to trim a pie cut into the inner support so you can bend it in to get it closer to the windshield post and thats really it.Other than that there a great fit, and look good, but on the pass side i`m having a slight problem bolting the top bolt to the firewall.Its not the fender i think its the cab cause it happened to me on the other fenders i had and it fit the same way.The drivers side is a perfect fit, so i gotta reposition the nut under the place where the top bolt goes thru and reweld it and it should be good to go.
thanks
pat