I fabb'd up a junk yard class 4 receiver to mount onto my Fisher Minute Mount II sno plow frame. The receiver was 54" wide from a Mopar, and it was cut down just far enough to slide up between the plow frame mounts. Two 3" long, 1" wide grade course thread bolts with fender and lock washers and it bolts up nice and snug. I had two 5/16" plates, one on each end to slide into the plow mounts and keep the entre assembly from pivoting downward. I love it because the bike rack is mounted low beneath the bumper and keeps my field of view clear of most of the bikes.
2010 Cedar Creek 5th Wheel 34SATS "The Beast"
2006 Ford F350 Lariat 6.0L Diesel
2003 Harley Heritage Softail "Hogzilla"
1988 Harley Softail Custom "The Fireman"
1986 Marriage to "Wifey" (patience of a saint)