Thanks for all the replies, guys. I agree that if I DIDN'T replace the steel lines, I'd always feel as though I didn't do a thorough job. Not a good thing to be weighing on your mind every time you drive your car!
A few more questions before I start disassembling things and ordering parts.
I've never done a "complete" brake system restoration like this before, with new steel lines and all. Do the aftermarket lines generally fit pretty well? Just wondering how big of a project to expect.
I've heard good things about Inline Tube; according to their website all their products are made in USA. Great!
Classic Industries is close to me and they carry all the lines I'd need; possibly they're a also supplier for Inline Tube. Are they a pretty good source for parts, such as shoes, rebuilt wheel cylinders or rebuild kits, hardware, etc.?
The last brake job I did on this car was about 30 years ago but it's accumulated very few actual miles. I believe most if not all the hardware currently on the car is American-made. The rubber has deteriorated but I might be able to re-use much of my hardware, and maybe even the shoes if they haven't become contaminated with brake fluid. My wheel cylinders can probably be rebuilt; don't know about the master. Should I consider re-using some or all of these parts, or just completely replace everything, even if my only choice is new/rebuilt offshore parts?
Thanks again. Looks like I've come to the right place with probing questions like this!