Good choice and good job getting it done. You won't regret it. Pretty cheap too without getting into that aircraft or A-N fitting stuff.
You might want to take a glance at the other brake lines on the car to make sure they aren't rusted also. Dot3 fluid (the regular brake fluid) retains moisture over time and could rust the lines from the inside-out. In addition if you're in a climate where they salt the roads, they will rust from the
I switched over from Dot 3 fluid to Dot 5 fluid (the silicone stuff that costs $22/qt) on my street rod when I built the brake syystem from scratch. No problems and no rust since I first built the car in 1975. This is expensive to do since you have to flush the master and wheel cylinders and possibly replace them if the seals are bad. Not necessary on your ride.
Enjoy your ride.