Nice project.
I’ll put in my standard advice to measure up the headstock for size before buying any tuners. You should be fine with any Y-style tuners as their bodies are pretty compact. But Fender-style elephant’s ears can be a very tight fit indeed on a 2+2 headstock and are often just too large unless it’s been built with them in mind.
Same with a replacement bridge. Whilst it’s probably got standard P/J bass spacing, just measure to double check, as you may find it’s a bit narrower. You’d also be amazed at the variation in spacings available on replacement bridges, so don’t go by looks alone.
All the best with the project.