Is yours a low or high hump?
This winter I was in our California winter home and was at the coast where some of the suppliers are. Our 55.2 truck has a high hump floor and I was told that the rubber floors were so bad the suppliers returned them and were waiting for a better remould.
Customers were not happy with the high hump floor mats. Evidently the low hump versions although not perfect were much better. It seems that the three big vendors out west and one in Nevada that we stopped at were all waiting for a new high hump version.
Good luck with your mat. Howie