The running board seal was so deteriorated that only the part under the retainer remained, so I never saw how the seal was against the running board. The retainer is contoured such that this is the correct orientation, with the seal hanging towards the inside and the screws visible. The retainer is two pieces with one long piece towards the rear, the rear piece follows the contour of the body and has a slight bend. This is for the '47.2 1-ton, long bed. My question is does the seal hang in front of the running board, or behind? The way that I was able to install the running boards is with the seal in front of the running board(seal towards the outside of the running board lip). So it will keep water from going behind the running board. I feel the seal should be toward the inside, behind the running board, to keep road water from splashing from under the truck onto the running board. My running board brackets were attached to the donor frame at the whim of the custom shop.
