Here is a picture of the mount when I was building it. It is 1/4" plate with 2X2X1/4 angle iron at the frame. I used 2 bolts on each side of the angle.

Of course there's another on the other side.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.