i have a 2" body lift and its at its limits, by that i mean, i had to bend them a little to come up thru the stock hole, and i had to adjust it perfectly to get it to work without enlarging the hole, it just about hitting the edges front and back, witha 3" it would be worse, you could either enlarge the hole , or i thought about making a plate to mount the shifters a little higher so the pivot is closer to the bottom of the floor, the linkage should still work, Thats what i found, hope it works for you.