1928-1929 Ford Stainless Firewall Support Bracket Kit. How about this pair of highly polished stainless steel radiator / firewall support rod brackets for your favorite Ford? They include stainless steel carriage head screws that are 10-32 thread by 1/2" long. Notice the nuts have lock washers built on? The bracket holes are almost 1 3/4" on center. This listing is for 2 brackets and screw kit as shown.