inside distance between brackets: 20 1/16"
edge of first bracket to front edge of forward holes: 4"
edge of second bracket to rear edge of rear holes: 3 5/16"
The entire slider could move ~1" either forward or back since it is just U-bolts on the driver's side. I have it mounted even with the passenger side slider which bolts onto the frame at its first support leg - this puts the rear edge of the sliders even with the front of the rear wheel well sheet metal on both sides.
edge of first bracket to front edge of forward holes: 4"
edge of second bracket to rear edge of rear holes: 3 5/16"
The entire slider could move ~1" either forward or back since it is just U-bolts on the driver's side. I have it mounted even with the passenger side slider which bolts onto the frame at its first support leg - this puts the rear edge of the sliders even with the front of the rear wheel well sheet metal on both sides.