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. smile
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~ 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)