I have one of those Mopar tube axles that I want to use on the Bonneville car. It's on a trailer now.
There are repo brake sets from Speedway. The ones I have are for a future '26 Chevy roadster project. The juice brakes are getting pricey here too. Spindles and brakes from '49-"54 F1s will fit those front axles. I like the looks of the '36-'39 wide lug wheels. They were used in racing here a lot because they were strong, light and plentiful. The trouble is they were all 16".
A guy named Marty Strode was building and racing vintage track roadsters in Washington or Oregon a few years back. I haven,t heard about him lately. The cars I saw had Chevy & GMC 6s and Flathead V8s.