The 3/4 ton frame is not the same. If not then I got a 1 ton setting in my garage. Half ton (Y's) out after the cab and the 3/4 ton goes straight back. The front is the same but the rear where the springs mounr are different, like I said unless the one I got is a 1 ton. I bought this other frame because my 1/2 ton was too rusted. This frame is heavier and longer but I was just going to shorten it to fit a 1/2 ton. Look in a shop maual and check.