if it is uhaul offering, they most likely do not have the engineering drawings -- mine had the uhaul sticker on it and is marked drawtite (embossed in the steel) --- I contacted drawtite about obtaining a set of drawings for the group, but they declined :ack: . They did send me a install sheet for their #75021 comanche hitch -- this was in response to my question to them about long/short bed fitment --- hitch was the same :wrench: waiting to measure and have converted to a cad drawing, before mounting it