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I know others disagree with my approach, but if the electroytics have not been abused eg powering up the set after decades of in activity, I try to retain the original electrolytics. Of the five pre-1950 RCA televisions in my possession, I have had to replace only two electrolytic cans. The rest survived. I do give the set an extended bench test to confirm all is well and if there is any doubt, I would replace it.
My 1947 RCA 721TS I restored four years ago is used regularly and retains all of it's original electrolytics. I bought the set in around 2015 and the previous owner said the set was retired in about 1960 to his parents attic and had not been powered in 55 years. I carefully and slowly reformed each electrolytic capacitor and replaced only the paper capacitors I deemed necessary before powering up. I don't use series light bulbs or variacs. When the the time comes "wham" on goes the power. I check, recheck and check again everything before the first power and I have never had a set in the last 40 years explode in my face. (I first worked on your chassis in 1969).
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