there is 3-4 different Letour models most years and range in quality. I am actually impressed with the wheels on my 77 Super leTour. Some of the straightest vintage rims I have come acorss yet.
Now I will be throwing a modern ramped 7speed 14-28 free hub on it to help reduce chain skate on under load shifting for a bit of improved drivability but I am keep the wheels on it for sure. Free hubs are cheap ($16 new for the one I am using) so if it is a rider and not for show don't be afraid to swap them out if you run into any problems with them. It a wear item and finding good parts to rebuild or good old Suntours is harder by the day. You may want to swap it just to preserve the original if it is in any kind of decent shape and a gold tone.