Yes.
That's really the reason this bit about using some scope to monitor/examine the ignition system is borderline silly. It wouldn't matter if that car was some "barn find" where it's been under a bundle of hay for the past 50 years or a daily driver that someone was using for weekend tours of the countryside, those parts were part of the normal maintance schedule and should be totally replaced on a regular basis.
It would be surprising that the engine shouldn't be rebuilt every 25,000 miles as well. Most pre-WW2 cars from the 20's and 30's barely made the
10,000-12,000 mile range before needing a rebuild. Most of those didn't have oil filters, there used to be kits to use rolls of toilet paper as a replaceable cartridge.The post war ones were better but no where near todays standards. Even into the early 60's, getting into the 50~60,000 mile range was "good". Getting up to 100,000 without a major overhaul was exceptional.
Something from 1948, if all original, would be a miracle if all it really needed was the ignition system replaced. It's cheap enough to do and see but wouldn't suprise me if the rings were gone, crank out of tolerance or even a lesser job of the cam lobes in the distributor were flat.
All the tech available today isn't going to change the need of getting your hands greasy.
-bruce snipped-for-privacy@ripco.com