sub57 - Just in case it may be of any help, below is a snap shot from a 1955.2-59 FAM with details on the supports for your Suburban (3106). Included is an update to show a later part number change (in red). Good luck on your fabricating these rods up! Shouldn't be terribly hard.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "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)