I think it should be about right if you look at the picture of the stock location in 90'rado's. I spoke with Red on Friday and the part number for 4.1" forward and not side offset is 81-420-294-08 for the F-body T56. He's coming out with a newer model that will have a bolt on offset arm instead of welded as the current one is. He said with the bolt on you can just send him back the offset arm for something different.