I'd recommend you keep your existing bike and add a battery assist to the front wheel. The Battery would fit nicely on/under the rack behind the seat.
Something similar to this ... https://www.ebay.com/p/Voilamart-26-Front-Wheel-1000W-Electric-Bicycle-Conversion-Kit/10030521227
It's the best of both worlds. The Electric assist will make it "feel" like a light-weight bike ... but you will still have the classic look of your masterpiece.
Good idea! I retrofitted a modern cruiser bike with an electric kit back in 2012 or so and it was a LOT of fun. It had a top speed of around 32mph and a range of 30 miles. The tech has really advanced a lot in the last seven years. Some of the eBikes are mind-blowing now.
Fashion and Function ... all in one bike.
:)
Yes! I’m not sure the wheels/tires could hold the weight.