Ford Cars share spindles with Thunderbirds.
Yes, Jimz. Post #2 shows the Ford Parts Catalog entry for our spindles. 1954-6 Ford cars used the same part number as 1955-7 Thunderbird. When Ford changed Thunderbird spindles in '58, Ford Cars shared that spindle, too.
I guess I've been lax because now I find many companies have a bracket for our spindles. I asked Mark (owner of Scarebirds) for info on his bracket. Remember, he only sells the bracket and spacer, but gives you part numbers for everything you need at the auto parts store. I like to make my best deal and I don't like shipping costs for iron parts, so this suits me just fine.
From the list below, I picked a random part (RC4233) and checked all applications. That piece was used in Buick Electra, Cadillac Fleetwood, Oldsmobile Cutlass, Pontiac Bonneville, and Chevrolet cars. Millions are out there.