If you just want a new fork, KEEP your old fork for reference. The reason we no longer commonly have threaded forks is because they came in an infinite number of sizes. You'll want to measure your steerer.

You can swap it out for a new threadless fork with a threadless headset, but it may prove more trouble than its worth, and there isn't anything wrong with a chrome fork.

Other than that, keep your old parts for reference. Measure your seatpost diameter. Your BB spindle may have to change to improve your chainline, so the threading is the only thing that matters. Italian?