Well, here I am again too quick on the draw for my suggestions. not me Didn't realize there was that little space between the side brackets and column collar. Might still be enough space to put a set of nuts on the studs to stiffen/secure them on the collar, then slide the brackets over the studs and finish the mounting?

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)