I just put one in on a 1959. Mine had 3 brackets that mount the motor.
One with 2 holes, 1 with 3 and 1 with four at the top underside dash.
One of those 4 has the grounding strap.
Those look like the right nuts.


~ BD.
"You won't find me in an old folks home" Pioneer Florida Cracker
1958 Apache Stepside
1958 Apache 1/2 ton Panel
1959 Apache 1/2 ton Panel