steering setup

[chevyhed53]

I hope someone can take a look at the attached photos and let me know what year this "bell-type" steering joint is from. My truck is a '56 on what is likely a late-'60s frame, but this front-end setup doesn't look like anything I've come across in LMC, Brothers, Ecklers or Jim Carter. As you (maybe) can see from the blurry photos, the rubber seal around the joint is corroded, and though the joint seems tight and there is very little free play in the steering, I want to change this piece out. Hoping I can just swap in a Borgeson U-joint, but not sure. Any other suggestions are much appreciated. Thanks!