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Here are my hardware parts awaiting cleaning and painting. Only one strap is pictured as the other is on the car and you will see that in pic 3. Small carriage bolt heads slide into the fitting on the radiator sides and then go through the strap and secured with nut. Other end of strap is bolted to bracket under the hood. Nothing screwed into sheet metal. The slotted hex head nut and drilled bolt and spring and cotter pin come up through the radiator mounting foot bracket on each side. My Model T experience is telling me to place a small leather strip or inner tube pad between radiator and mounting foot.
Hope this helps visualize what you need.