'69 Fender on a '68 Dart

I'm sure this has come up before but I'd like to replace the front fenders on my '68 Dart instead of doing a lot of patch work. Finding good '68 fenders seems like hitting the lottery. I know of some '69 Dart fenders fairly local to me that are in pretty good shape and don't need near as much work. I know they'll bolt on but the marker lights are different. I've also heard the headlight mounting buckets are positioned differently. Has anyone here ever converted a '69 Dart fender to a '68 Dart with good results? What is involved in getting it done right?
Thanks.