If I recall. My Duramax bed height was 50 - 51" and my F250 is 55- 56". I have a leveling kit with 37s and airbags on the 250. The trailer place thought the flip was going to be too high but after it was hooked up and bags filled it sat damn near lever. Probably and inch low in the front. The axle flip raised it 6 - 7". 5" would have been just right. I bought these and mounted them on the ramp door. Then used some aluminum ATV ramps to extend the ramp door. I had a 4 seat 1000 RZR at the time and ground clearance was an issue. Now have a 4 seat Turbo S so don't use the extended ramp as much. I just put the RZR in 4 low and crawl.
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